I have tested a TS with the fixed sight and the notch is way to wide for me. I'm waiting for a new TS myself now, but I will change the rear sight immediately with a LPA sight.
The fixed sight wont work in the IPSC box with +2 base pads. BoMar sights are most likely stronger than LPA, but I like the features of LPA better. The blade is wider, has a narrower and deeper notch and is serrated all the way to the top.
Regards
Johnny Nilsson