I was looking at getting a pair of RX 12 or the MX78 for about a year for boilerplate ice and happened to see new RX 12 with plate/marker bindings for $600. in 160 length... So I got them. I am 5'4, expert. My last pair of skiis were 169. Atomic Crimson and when I demoed the 161 vs. the 169 Crimson----the 161 was wishy washy and chattery and not so stable at fast speed and the 169 felt like an attachment of my body (which is what I'm looking for in a ski) At that point I was between 165-145 pounds.
To the present....- I tore my ACL and gained weight (a lot) and was at 270--now 245. just starting to ski normal again and lose weight. Skiied the 160 Kastle today for the 1st time. My question is- do you think the chattery--significantly unstable at fast speed (could not even ski at half the speed of my 169 Atomic Crimsons without getting nervous), not enough edge on the boilerplate....?will that all go away and it will be plenty of ski when I'm back at 150 or 140? I had read in this forum that usually people ski the RX-12 short?