i have said until i am blue in the face that it depends on the coils you like to use, mine are not micros - they are too big, and the posts on other atties are too close together, although i can get a dual coil Trunker mega coil in an igo-w4 on a LP Reo.
I'm willing to concede that a Chalice or an AFC cyclone may be better, but they are between twice and 4 times the price of a RM2, which is why i have loads of them!
I'm also at the point of educating HRH to at least fit her own coils (i don't mind making them) and faced with some of these things she'd swear at me.
T