I haven't had as much hangar time as I'd like, and had a bunch of dental work to recover from on top of it all, so John gets credit for the strakes. I just helped hold the skins as final assembly was completed. In these pictures you can see the dark ProSeal. It goes on VERY thick and stiff, but looks like it does a good job of forming a solid barrier. Between that and the hat method for installing the top skin, I think there's a good chance of either getting a seal on the first try, or coming very close. We'll see!
These pictures are very dark because the hangar is very dark. It's winter right now, and we're having to use two propane heaters to get the hangar warm enough to do any work at all. John asked me to get some electric blankets to help the strakes stay warm enough to cure. I wasn't able to find any, but it worked out OK anyway. The 50-50 Fast/Slow mix we are using for our MGS managed to cure rock-hard overnight.