I just picked up a Dynaflight 1/5 scale spitfire that was flown with a Saito 150. I am installing a YS 1.20 fz. Using the existing mounting holes on the wood rail motor mounts, my prop hub ends up about 3/16" behind the built in cowling of the plane. Look at the pictures below.

Is there a thicker prop hub available to fix a situation like this? Can you offer any other suggestions?

I don't want to attempt redrilling new holes in the motor mounts because I cannot get new blind nuts on the back side of the mounts, there is not enough "meat" to support new holes without moving the engine forward a good 1/4" or more. This will then leave a huge space behind the spinner backplate.

I am open to any ideas.....
Tyler