Hoss,
Beautiful job on your A6M5. I built this kit about 10 years ago for a commission job, and I liked it so much I built it again when I got my hobby area set up in my new place. May have to build it again to do it more justice! This is probably one of the premier kits in 1/48 in my opinion.
Regarding Tamiya's decals, I've often had the same problem you outline, the decals are too thick*! Or so I thought. I've heard a good trick on how to use these decals.
Step 1- go to your local craft store armed with a coupon.
Step 2- buy a candle warmer and a glass jar to set on it. Use this for the water.
Step 3- wait til the water gets hot.
Step 4- soak the decal for a good while
Step 5- apply as normal.
From what I understand, the "thick* decals" actually have a thicker adhesive, and the warm/hot water helps soften it. In my limited experience, the hot water does help. Give it a go sometime!
Very nice model, thanks for sharing!