I have never skied on a radius of less than 18m (I know it sounds impossible/unlikely) and spend a lot of time (training/race) on 21m GS skis.
This is all going to change- I have the opportunity to ski on the Elan SLX Fusion Pro in 155, 160, 165 or 170cm. I will get a 178 GSX Fusion Pro as a "cheater" GS and will continue to ski on the WC GSX (183cm).
I will immerse myself in PMTS this season (I can not wait) and the SLX 165cm may be the right ski for this and SL which I have not trained in a long time. Any thoughts or advise will be greatly appreciated. JR