diff --git a/cli/chain.go b/cli/chain.go
index 288793ee4..e47bc5d81 100644
--- a/cli/chain.go
+++ b/cli/chain.go
@@ -28,7 +28,7 @@ import (
 	cbg "github.com/whyrusleeping/cbor-gen"
 	"golang.org/x/xerrors"
 
-	"github.com/filecoin-project/lotus/api"
+	lapi "github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
 	"github.com/filecoin-project/lotus/chain/actors"
 	"github.com/filecoin-project/lotus/chain/stmgr"
@@ -162,7 +162,7 @@ var chainGetBlock = &cli.Command{
 	},
 }
 
-func apiMsgCids(in []api.Message) []cid.Cid {
+func apiMsgCids(in []lapi.Message) []cid.Cid {
 	out := make([]cid.Cid, len(in))
 	for k, v := range in {
 		out[k] = v.Cid
@@ -387,6 +387,16 @@ var chainInspectUsage = &cli.Command{
 			Usage: "specify tipset to view block space usage of",
 			Value: "@head",
 		},
+		&cli.IntFlag{
+			Name:  "length",
+			Usage: "length of chain to inspect block space usage for",
+			Value: 1,
+		},
+		&cli.IntFlag{
+			Name:  "num-results",
+			Usage: "number of results to print per category",
+			Value: 10,
+		},
 	},
 	Action: func(cctx *cli.Context) error {
 		api, closer, err := GetFullNodeAPI(cctx)
@@ -401,9 +411,22 @@ var chainInspectUsage = &cli.Command{
 			return err
 		}
 
-		pmsgs, err := api.ChainGetParentMessages(ctx, ts.Blocks()[0].Cid())
-		if err != nil {
-			return err
+		cur := ts
+		var msgs []lapi.Message
+		for i := 0; i < cctx.Int("length"); i++ {
+			pmsgs, err := api.ChainGetParentMessages(ctx, cur.Blocks()[0].Cid())
+			if err != nil {
+				return err
+			}
+
+			msgs = append(msgs, pmsgs...)
+
+			next, err := api.ChainGetTipSet(ctx, cur.Parents())
+			if err != nil {
+				return err
+			}
+
+			cur = next
 		}
 
 		codeCache := make(map[address.Address]cid.Cid)
@@ -428,7 +451,7 @@ var chainInspectUsage = &cli.Command{
 		byMethod := make(map[string]int64)
 
 		var sum int64
-		for _, m := range pmsgs {
+		for _, m := range msgs {
 			bySender[m.Message.From.String()] += m.Message.GasLimit
 			byDest[m.Message.To.String()] += m.Message.GasLimit
 			sum += m.Message.GasLimit
@@ -467,23 +490,25 @@ var chainInspectUsage = &cli.Command{
 		destVals := mapToSortedKvs(byDest)
 		methodVals := mapToSortedKvs(byMethod)
 
+		numRes := cctx.Int("num-results")
+
 		fmt.Printf("Total Gas Limit: %d\n", sum)
 		fmt.Printf("By Sender:\n")
-		for i := 0; i < 10 && i < len(senderVals); i++ {
+		for i := 0; i < numRes && i < len(senderVals); i++ {
 			sv := senderVals[i]
-			fmt.Printf("%s\t%0.2f\t(%d)\n", sv.Key, (100*float64(sv.Gas))/float64(sum), sv.Gas)
+			fmt.Printf("%s\t%0.2f%%\t(%d)\n", sv.Key, (100*float64(sv.Gas))/float64(sum), sv.Gas)
 		}
 		fmt.Println()
 		fmt.Printf("By Receiver:\n")
-		for i := 0; i < 10 && i < len(destVals); i++ {
+		for i := 0; i < numRes && i < len(destVals); i++ {
 			sv := destVals[i]
-			fmt.Printf("%s\t%0.2f\t(%d)\n", sv.Key, (100*float64(sv.Gas))/float64(sum), sv.Gas)
+			fmt.Printf("%s\t%0.2f%%\t(%d)\n", sv.Key, (100*float64(sv.Gas))/float64(sum), sv.Gas)
 		}
 		fmt.Println()
 		fmt.Printf("By Method:\n")
-		for i := 0; i < 10 && i < len(methodVals); i++ {
+		for i := 0; i < numRes && i < len(methodVals); i++ {
 			sv := methodVals[i]
-			fmt.Printf("%s\t%0.2f\t(%d)\n", sv.Key, (100*float64(sv.Gas))/float64(sum), sv.Gas)
+			fmt.Printf("%s\t%0.2f%%\t(%d)\n", sv.Key, (100*float64(sv.Gas))/float64(sum), sv.Gas)
 		}
 
 		return nil
@@ -763,7 +788,7 @@ var chainGetCmd = &cli.Command{
 
 type apiIpldStore struct {
 	ctx context.Context
-	api api.FullNode
+	api lapi.FullNode
 }
 
 func (ht *apiIpldStore) Context() context.Context {
@@ -791,7 +816,7 @@ func (ht *apiIpldStore) Put(ctx context.Context, v interface{}) (cid.Cid, error)
 	panic("No mutations allowed")
 }
 
-func handleAmt(ctx context.Context, api api.FullNode, r cid.Cid) error {
+func handleAmt(ctx context.Context, api lapi.FullNode, r cid.Cid) error {
 	s := &apiIpldStore{ctx, api}
 	mp, err := adt.AsArray(s, r)
 	if err != nil {
@@ -804,7 +829,7 @@ func handleAmt(ctx context.Context, api api.FullNode, r cid.Cid) error {
 	})
 }
 
-func handleHamtEpoch(ctx context.Context, api api.FullNode, r cid.Cid) error {
+func handleHamtEpoch(ctx context.Context, api lapi.FullNode, r cid.Cid) error {
 	s := &apiIpldStore{ctx, api}
 	mp, err := adt.AsMap(s, r)
 	if err != nil {
@@ -822,7 +847,7 @@ func handleHamtEpoch(ctx context.Context, api api.FullNode, r cid.Cid) error {
 	})
 }
 
-func handleHamtAddress(ctx context.Context, api api.FullNode, r cid.Cid) error {
+func handleHamtAddress(ctx context.Context, api lapi.FullNode, r cid.Cid) error {
 	s := &apiIpldStore{ctx, api}
 	mp, err := adt.AsMap(s, r)
 	if err != nil {