I have been setting up some of my models n have been installing n removing engines. It has been a slow process using Allen wrenches n T handle wrenches. So giving it some thought, I decided to mod one of my T handle wrench. It is an old Harbor Freight brand. I started to cut the T part off with my Dremel but was too slow a process. That plastic handle is tough stuff. So I got my torch and just melted the plastic off. Worked very fast. What I had then was a long wrench with a short offset. I cut the offset off n now can use it with my Harbor Freight smaller drill. The wrench is long enough to clear the engine. It makes working with engines easier for me.

Pics.
1. New Tool. 2. Melted Plastic Handle. 3. Engine Work

I like your idea....going to make one right away!