ben_travis i've made it quite easily.. all this took about 1.5 hour... if someone interested i can tell the fast way to perform such work... what about strength... of course it became less stronger... but not much... it seems to be a good proportion of weight/strength... i dump about 150 grams... and its about 30 grams to go if i will do quad-holes btw i dump about 100 grams by cutting off one layer from the front rim... some action pics of me after dumping: ps: i never did pedalup to 119 before... and it was pretty easy... sides are easy too