You need 2 strong hands to hold the dropouts an extra 4mm apart when you put the wheel in there. The annoying thing is you have to do it every time. It's not recommended that you try to cold set an aluminum frame. I've also even heard people claim that forcing a 130mm hub in it all the time leads to cracks, but I've never seen that verified, and I saw people do this to your exact frame all the time in the 90's when STI first came out.

I personally wouldn't bother, but you may have your reasons.