Hi Stone, I figured out the hardest part. Paterson core diameter is 25.5mm, wider centre hole on paterson reel is 32.5mm. Difference is 7mm. In my "project box" I just found 3.5mm thick copper wire. Wound it around centre core and it fits perfectly with wider centre hole of the reel and centre core. Now It looks like I have to glue top part to the centre core with crazy glue with 70mm film in the reel, to keep right distance. And even Paterson "loading" move is still OK. Only drawback is that I will have one Paterson dedicated reel and centre core just for 116 format.