diff --git a/config.go b/config.go
index 43c551470..2eae641ab 100644
--- a/config.go
+++ b/config.go
@@ -20,14 +20,11 @@ import (
 	"log"
 	"time"
 
+	"github.com/blevesearch/bleve/index/scorch"
 	"github.com/blevesearch/bleve/index/upsidedown/store/gtreap"
-	"github.com/blevesearch/bleve/index/upsidedown"
 	"github.com/blevesearch/bleve/registry"
 	"github.com/blevesearch/bleve/search/highlight/highlighter/html"
 	index "github.com/blevesearch/bleve_index_api"
-
-	// force import of scorch so its accessible by default
-	_ "github.com/blevesearch/bleve/index/scorch"
 )
 
 var bleveExpVar = expvar.NewMap("bleve")
@@ -79,7 +76,7 @@ func init() {
 	Config.DefaultMemKVStore = gtreap.Name
 
 	// default index
-	Config.DefaultIndexType = upsidedown.Name
+	Config.DefaultIndexType = scorch.Name
 
 	bootDuration := time.Since(bootStart)
 	bleveExpVar.Add("bootDuration", int64(bootDuration))
diff --git a/examples_test.go b/examples_test.go
index 3290f2431..3a629c301 100644
--- a/examples_test.go
+++ b/examples_test.go
@@ -449,6 +449,7 @@ func ExampleSearchRequest_SortByCustom() {
 			Field:   "Age",
 			Missing: search.SortFieldMissingFirst,
 		},
+		&search.SortDocID{},
 	})
 	searchResults, err := exampleIndex.Search(searchRequest)
 	if err != nil {
diff --git a/index.go b/index.go
index 9cc753ea6..e5d686c5e 100644
--- a/index.go
+++ b/index.go
@@ -16,6 +16,7 @@ package bleve
 
 import (
 	"context"
+	"github.com/blevesearch/bleve/index/upsidedown"
 
 	"github.com/blevesearch/bleve/document"
 	"github.com/blevesearch/bleve/mapping"
@@ -261,7 +262,7 @@ func New(path string, mapping mapping.IndexMapping) (Index, error) {
 // The provided mapping will be used for all
 // Index/Search operations.
 func NewMemOnly(mapping mapping.IndexMapping) (Index, error) {
-	return newIndexUsing("", mapping, Config.DefaultIndexType, Config.DefaultMemKVStore, nil)
+	return newIndexUsing("", mapping, upsidedown.Name, Config.DefaultMemKVStore, nil)
 }
 
 // NewUsing creates index at the specified path,
diff --git a/index/scorch/segment_plugin.go b/index/scorch/segment_plugin.go
index 94b4cee40..99c3b9c89 100644
--- a/index/scorch/segment_plugin.go
+++ b/index/scorch/segment_plugin.go
@@ -71,11 +71,11 @@ var defaultSegmentPlugin SegmentPlugin
 
 func init() {
 	ResetSegmentPlugins()
-	RegisterSegmentPlugin(&zapv15.ZapPlugin{}, false)
+	RegisterSegmentPlugin(&zapv15.ZapPlugin{}, true)
 	RegisterSegmentPlugin(&zapv14.ZapPlugin{}, false)
 	RegisterSegmentPlugin(&zapv13.ZapPlugin{}, false)
 	RegisterSegmentPlugin(&zapv12.ZapPlugin{}, false)
-	RegisterSegmentPlugin(&zapv11.ZapPlugin{}, true)
+	RegisterSegmentPlugin(&zapv11.ZapPlugin{}, false)
 }
 
 func ResetSegmentPlugins() {