diff --git a/codex/blocktype.nim b/codex/blocktype.nim
index f74295a3..dd3b70e0 100644
--- a/codex/blocktype.nim
+++ b/codex/blocktype.nim
@@ -31,7 +31,7 @@ import ./codextypes
 export errors, logutils, units, codextypes
 
 type
-  Block* = ref object of RootObj
+  Block* = object of RootObj
     cid*: Cid
     data*: seq[byte]
 
@@ -86,12 +86,11 @@ proc `$`*(b: Block): string =
   result &= "\ndata: " & string.fromBytes(b.data)
 
 func new*(
-    T: type Block,
-    data: openArray[byte] = [],
-    version = CIDv1,
-    mcodec = Sha256HashCodec,
-    codec = BlockCodec
-): ?!Block =
+  T: type Block,
+  data: openArray[byte] = [],
+  version = CIDv1,
+  mcodec = Sha256HashCodec,
+  codec = BlockCodec): ?!Block =
   ## creates a new block for both storage and network IO
   ##
 
diff --git a/codex/manifest/manifest.nim b/codex/manifest/manifest.nim
index 922a1062..486a8fc3 100644
--- a/codex/manifest/manifest.nim
+++ b/codex/manifest/manifest.nim
@@ -29,7 +29,7 @@ import ../logutils
 # TODO: Manifest should be reworked to more concrete types,
 # perhaps using inheritance
 type
-  Manifest* = ref object of RootObj
+  Manifest* = object of RootObj
     treeCid {.serialize.}: Cid              # Root of the merkle tree
     datasetSize {.serialize.}: NBytes       # Total size of all blocks
     blockSize {.serialize.}: NBytes         # Size of each contained block (might not be needed if blocks are len-prefixed)
@@ -148,7 +148,7 @@ func rounded*(self: Manifest): int =
 
 func steps*(self: Manifest): int =
   ## Number of EC groups in *protected* manifest
-  divUp(self.originalBlocksCount, self.ecK)
+  divUp(self.rounded, self.ecK)
 
 func verify*(self: Manifest): ?!void =
   ## Check manifest correctness
diff --git a/codex/streams/storestream.nim b/codex/streams/storestream.nim
index d3b8c036..a20921dd 100644
--- a/codex/streams/storestream.nim
+++ b/codex/streams/storestream.nim
@@ -110,7 +110,7 @@ method readOnce*(
     if blk.isEmpty:
       zeroMem(pbytes.offset(read), readBytes)
     else:
-      copyMem(pbytes.offset(read), blk.data[blockOffset].addr, readBytes)
+      copyMem(pbytes.offset(read), blk.data[blockOffset].unsafeAddr, readBytes)
 
     # Update current positions in the stream and outbuf
     self.offset += readBytes
diff --git a/tests/codex/slots/testslotbuilder.nim b/tests/codex/slots/testslotbuilder.nim
index 5f4e65d4..08bb7f24 100644
--- a/tests/codex/slots/testslotbuilder.nim
+++ b/tests/codex/slots/testslotbuilder.nim
@@ -331,8 +331,8 @@ suite "Slot builder":
         protectedManifest,
         cellSize = cellSize).tryGet()
 
+    var
       verifyManifest = (await builder.buildManifest()).tryGet()
-      offset = verifyManifest.verifyRoot.data.buffer.len div 2
 
     rng.shuffle(
       Rng.instance,