perthmtb – where did you hear about the 40t snagging the front mech?
Read it on one of the fora. Just had a quick Google but couldn’t find it, sorry. IIRC, the issue was the outer plate of the FD cage hitting the bash when in the ‘big’ ring. No need to have a bash larger than your big ring IMHO, you reduce clearance and are more likely to hit things…
On my race bike I run the M785 without bash, as I’m less likely to hit stuff. On my ‘fun’ bike I fitted an SLX M665 because it has a built in bash. Yes its 9sp, but I’ve had absolutely no issues running it with the rest of the drivetrain being 10sp, and I’m anal about my shifting 😀