Yea just to add to what Radi had to say,
Go with the Fliptop and who knows about your swap magic situation... I mean the flip top might fight perfectly and make no extra noise or if it does you can just put something like a small book on it to push it down a little which does no hard to the unit.
Personally before I got my DMS4 EZI PRO thats what I used and before i got mine I ordered and installed one for a friend of mine. When it got to my house i was so excited and couldnt wait the next day to get his ps2 so i put it on mine to try it out. It installed fine but it made noise and it needed to be weighed down. Next day i got his ps2 and installed it on his and it worked golden... no noise no nothing.
Overall it would be a better choice to go for a DMS4 (get a EZI if you dont like to solder) because backups require no patch's or anything else... plus i like the direct boot ability. But if you have your heart set on the swap magic and flip top set then go for it, its simpler but it has its setbacks.