David, I was wondering how you removed the H-stab? I use the Dremel Multi tool. It has been a real life saver for dissecting a model. It's about a hundred bucks! I had to remove a stab on an astro hog and it did it perfectly. Be sure and direct the blade away from the seat area and into the stab, the part that can be replaced easily. I removed the motor rails in a 1937 Super Buckaneer and put in a ply radial mount. Also, when you remove something like the H-stab or anything that is epoxied on, use the heat gun first. It will loosen the epoxy and it will let go. It will ruin any covering but if you are removing the stab, it is probably ruined anyway. Doesn't matter how long it has been glued. Also, NEVER use 5 minute epoxy to put any critical area together like stabs, wing center sections, fire walls and anchors. It dries too fast and doesn't penetrate and will peel off especially if fuel gets on it. At least 15 minute. I use 30 minute. If you see brown epoxy in those areas of other planes that is 5 minute epoxy. it will hold for some time but one day, all of a sudden! Well, you know! It's called 're-kitting!
Just a few tid bits from my experiences.
Very best wishes.
bird..