I'm in the same situation & so far this is the best combo that i find matching deferent gears in the gear calc. that's the closest to a stock rsx type-s tranny that i can do for a person that owns an EP3 & a tsx tranny. but mechanically would this combo work?
i added a 5th rsx type-s since it's not that expensive. I'm wondering if that is mechaniclly possible too.
EP3 1st & 2nd, tsx 3rd & 4th, type-s 5th & tsx 6th. ep3 final drive.
ep3 ..... 1st: 3.062
ep3 .... 2nd: 1.769
tsx ..... 3rd: 1.355
tsx ..... 4th: 1.028
type-s . 5th: 0.921
tsx...... 6th: 0.659
ep3 final drive 4.764