By tilting the fin/sustainer assembly so each fin pair pointed up at 45˚ I was able to apply the epoxied strips into all four bottom interior interfaces as well as the two fin fillet areas since gravity would force the resin right where I wanted it:
I should note that I also loaded the exterior two fin fillets with colloidal silica as it increases strength and eliminates resin drip during curing. I've had this batch of West Systems epoxy and both colloidal silica and microfibers for years but never appreciated the power of the additives until this build.
I then repeated this procedure for the other 18 interfaces (in three batches of six, of course).
Now the sustainer's on hold until my 2-part expanding foam arrives from Giant Leap rocketry. I had previously purchased a similar foam, Foam-It, for <$40 at Home Depot but this type failed me because part A had cured in the can. Better living through chemistry? Please? I went to purchase more Foam-It to find it had increased in cost to $96 at three different places!! Inflation rocks. I decided to purchase the same volume of foam from Giant Leap for $41. Quite a price difference no?
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