Exchanging chip in V7

[fratres]

I recently bought a modded PAL V7, not knowing which chip was inside. When I opened it up there was a bad surprise waiting for me: a chip with Magic III and smiley was installed, using an UBICOM-chip so it seems to me it´s not even an original, but a clone Magic. Now after many annoying hours of replaying after several freeze screens in different games, i am wondering if I could exchange the chip by myself rather easily. I have no soldering experiences, but thought maybe some of the cables could remain inside so the installation might be easier than on an unmodded console. Does anyone know if an installation of a Crystal, Infinity or maybe just a Duo2 could made rather easily or uses same solderpoints on the MB? Tried to check some installation diagrams, but is still rather hard for me to estimate the effort. And a professional install is too expensive over here.