I absolutely agree about Mark and C-4 customer service: its superb! Due to a delay in manufacturing the rear hub I ordered a few months ago, C-4 gave me a free upgrade to the (as yet unreleased) RH 145SP. There was a problem of some sort with that pre-production hub, so I sent the wheel to him from Washington (State). He fixed the hub, rebuilt the wheel and then drove 100 miles to my sister's house in California (where I was visiting) to assure I had it on time for a ride. Later on, when I developed an axle problem with the FH55 (still not sure what caused that), Mark decided that, since these were my daily use wheels, the FH65 would be a better choice so he rebuilt the wheel (8 gram weight increase bringing the total for the set to ~1348 grams). Hard to beat that!
<...j'ai fini par deviner que quelques-uns d'entre les vieillards sucaient l'interieur de leurs joues et laissaient echapper ces clappements bizarres>