Here's an idea that I found very helpful when cutting all the corner blocks: Make the blocks from 3/4" thick clear fir. You'll find it much easier to cut the corner blocks using this material as you don't have to take the compound bevel into account.
The 1/8" additional thickness allows the blocks to be fit as needed. When cured, the portion or edge of the block that is standing proud is easily sanded down flush with the surrounding material. Hope this is of help to someone. Peter Johnson KR-2Sexy Kenora, Ontario

