I have 2 sets of titanium T-LCSG but only 1 size 20. I would like to make use of the guides I already have on hand Could I successfully use TRVSG in 25 and 20 for the strippers and/or 2nd guide in the train? They are going on 13' CTS S8 blanks I have been sitting on. Mahalo in advance for any advice.

Mark, the only thing critical is the heights of the guides you choose. They could all be different models and you could still build a good layout if the spacing and heights came out with good concentricity and proper choke at each position. Personally, I think the LC and LRV would look pretty odd paired together in the same train. One has a very long footprint while the other is very short. I assume you are thinking they are both "reverse" guides so they would look OK together but since all LRV's are eventually followed by a KW, I think it would be "less noticeable" to go to a KW after the LC. Not sure this answers your question but...

Mahalo Jim. I ordered another sized 20 T-LCSG to complete the train. I will use the LRV on my next builds

I think that's your best bet, Mark. Good luck with the build.