That sounds like a great idea Reinhard but look into a product manafactured by UPOL called SMC Filler,this product is a finer and much heavier version of short strand filler,thus giving you greater strength i use it when doing deep filling or repair work and several years on it has not dissapointed me with no movement at all.
Regards
Allan Knight /ubbthreads/images/graemlins/twocents.gif
Regards
Allan Knight /ubbthreads/images/graemlins/twocents.gif