The problem with those collet extensions is they add quite a bit of lever action to the z assembly. I think that was a big contribution to Tom’s horrible cutting in his build video.
Even if they are shortened so they are touching the chuck? If it was possible I’d just replace the Makita collet with the ER11. There’s no good reason for there to be so many different standards for collets, and Makita doesn’t even make a 3mm or 1/8" collet, you have to get them 3rd party.
Yea, it’s still adding length. We want as little stick out from the z assembly as possible. I have 3rd party collets for my dewalts, they’re worth it. Most of the time, they’re better made than from the oem.