I just bought a pair of RCS speedmax and they are "prewaxed" with some fluorine wax. Do I need to wax them 5 times with base prep as usual or can I ski with them directly ?
If you have the ability to, put them in a hotbox. The pre-wax Fischer uses is simply a wax roller that some guy in the factory rolls the ski over in order to prevent them from drying out (it's considered a storage wax). The "ghetto" hotbox is to put the warmest wax you have on the ski, run the iron over them 3 times (wax should be drying right behind the iron), let cool for a couple minutes, then do another 3 passes. You should do this about 7 times. Then let the ski cool for 30-60 min, scrape and brush with a brass or soft steel brush. Now repeat this whole procedure 3 times. Once that's done, seal it in with a CH7 of equivalent, scrape and brush and finish with the wax you plan to ski on. This is what the national team wax tech was telling us to do before hotboxing became the norm and used to be a full day procedure for me when I bought skis.
What I've learned this season is that 15% faster bases is accurate, but that the extra weight of the ski is the reason why you won't see huge differences in race times. Also, there is rumour that next year will be the last year for the carbonlites, because the bi-directional core is proving to not be very strong and the bases are already starting to curve up (especially on customers skis who are heavier and have been skiing on them a lot). They are now being marketed to us as a ski for hilly areas and only for racing on, not training, unless you have lots of money to blow.