That's a hell of a kluge. But at least it works. In the long run it will probably be cheaper and easier to find another f8 SA or one of the f6.8 Angulons that's in a better shutter.
Like this one:
http://www.ebay.com/itm/Schneider-An...8#ht_63wt_1399

I have no affiliation with the seller - just something that turned up on a quick ebay search.