Ok just going to post this for the benefit of anyone who searches this thread in the future and is attempting a pug bb conversion . Ordered a 102 mm BB but a new problem has arisen . There is a slight ridge in the inside bottom of the BB cup . It starts when the threading ends on either side and it continues until it reaches the beginning of the threading on either side . Its about 1 mill in height and 1 mill in width and it runs straight .The BB I ordered has a slight lip going around it so that it contacts with this ridge and I cant push it through . The BB is a token 68 x 102 mm BB . Dont know if this inner ridge is on most peugots . Next plan is to attempt filing the ridge down without damaging the threads which should take a long time , and/or hacksawing a small notch into the lip on the cartridge BB .