Nice compact build, Adrian!
One minor observation. Correct me if I'm wrong but did you glue the dichros over the adjustment screw hole on Dave's (of Lasershowparts) dichros mounts? If they are the same as mine, if you need to adjust them down, the adjustment screw needs to thread through that hole. This would, of course, break or dislodge your dichros. I only ask as I did this the first time and had to remove the dichros and mirror, cracking one dichro in the process.
I remounted one set higher the next round, but after seeing a great video from Planters I saw that you can mount them on the 45 degree edge instead. Wish i had thought of that as it makes a nice straight line of dichros mounts allowing even smaller optic plate layouts.
Cheers!
David