Hmm, I never considered that. Something to keep in mind!
I have a whole bunch of older hosts that take 17mm drivers and I want to use my own driver designs in them, what ever that design is. I’d just rather use all of these old hosts than sell or discard them, and messing about with lathes is not something I have any interest in at all. The first lights that will be seeing them are these: Build/Mod: Zoomie with Brynite B158B host (wider flood mod) I have custom copper pills for them and I’ll be putting 12V XHP35 HI or similar LEDs in them, they can’t fit larger than 17mm drivers.
But ultimately, yes, guilty as charged! It’s a hobby, that’s all it’s ever been for me. It’s satisfying to have got it working with 17mm and I learnt a few things in the process 
Up-scaling is easy, in it’s easiest form all I have to do is increase ground ring diameter. If I put a little more effort into it than that, well, if I can make it work with 17mm then I think I can make it work with more space without compromising layout too much 