Two data to consider
Scientology fits inside the subject of TROM. Therefore, any practice of Scientology would not go against one's practice of TROM.
Dennis used to do "book and bottle" to warm up his theta perceptics. That's a Scientology process. You can look it up. It's called "Opening Procedure" by duplication, a process of walking the preclear across the room to ask him questions about the book at one end and the bottle on the other.
Both data above are in the lectures.
In the book Handbook for Preclears, it's advised one do Self Analysis to balance out one's case.
I don't think in terms of 'squirreling'. That's name-calling invented by Ron to keep people from looking at anything outside Scientology for answers. Strictly speaking, Trommers are squirels according to Ron.
Dennis does say he would commend anyone who came up with better techniques. I am not even doing that. I am just applying the datum that Scientology fits inside TROM, and that according to Scn S.A. can be used to balance out one's case if self-proceessing gets too intense for one.
My advice in this posting is just that--- it's not an enforcement and I am not putting it forth as "TROM Gospel".