Hello Gary,
Hmm...
https://i.imgur.com/3zSg3Sj.jpg
Hmmm...
https://i.imgur.com/EoRbQMq.jpg
Hmmmm...
https://i.imgur.com/yXlNOWz.jpg
It all depends on how badly you want to integrate the RACI onto the Schmidt. Meade is no more. Orion swallowed them up. If necessary, you can drill new holes into the RACI's shoe to fit the existing holes on the telescope, or for a less appetising option, into the telescope itself to match those of the RACI. That is realised upon inspecting the two areas in question, once both are before you.
I say go for it, and let the chips fall where they may. Times are hard these days, and there's probably no other option.
Then, it's not really difficult at all to retro-fit something like that.
I found this, and of someone else wanting to do the exact same thing...
https://www.cloudynights.com/topic/4...n-lx90-8-inch/
...and they succeeded, I gather, almost 7 years before.