I vote with the "let it be" crowd. If you got it together properly you'll only break something trying to seperate it. The wing saddle may take 10g or so in a snap roll, but there is little flexing. Little advantage to the 30 minute (IMHO) in that application beyond time to work.

I use 30 or 45 minute for everything. I'm patient and usually don't build in a hurry, and I feel it is stronger partially because it has longer to permiate into the wood and you can mix longer and leave it set to "kick" so I believe the results are more consistant. Used to keep an assortment, but I end up with my brush stuck in kicked 5min mix just before I get that last little dab on.