The smaller one fits on the 6x30 finder, if someone wants to mount it and leave it they will need some shims, email TS and tell them that your larger one will not fit, maybe they will take it back. I have the u180 and find that the thing is best used as needed and not attached, the outer FOV is not in focus enough for my taste to leave it on all the time but it is fine when you don't want to break your neck while using the finder. Maybe you can find a machine shop that would be able to do the deed for you and mill this larger one to fit on the larger finder.
As to adapters to put on your dovetail, ADM has a Losmandy style one that screws onto the mounting gear supplied by Tak
edit: it might be easier to have a machine shop make a new ring that screws onto the Tak finder than have the TS right angle ground down, just replace the Tak ring with the new one and you still have astro equipment that has not been modified
Edited by greenstars3, 24 January 2020 - 03:07 PM.