Hi friend, 
I thinking in how can do a split mould on to these motorcycle saddlebag, where I split... any help I will appreciate

Greetings from Chile

I have 3 and 4 part moulds, created flanges which have a 2cm polished flat (like a U Channel profile) on the edges outside and I seal them with gum tape  only having to put a bag into the indise as usual
Other people bag a mould like this as a mould which is definetly easier but time consuming with more bagging required