I also ended up buying 1/8” 1/4’ and 3/8” ER32 collets for the convenience. I’ve never had a cutter slip but then I use bearing nuts on my chucks:
**LINK**
I also use a longer 4 prong spanner.
I wouldn’t be without my ER32 tooling and apart from a full set of collets I have three chucks, several collet blocks and a Stevensons Spin Indexer.