Rudy:

The pictures look like you've used "Cutting board" to make your rear engine mount. If this is so, it should be simple to drill new mounting holes in the fuselage metal and move it to the rear. This would give youo more prop clearance as well as moving the CG back.

And I hope you meant the main gear was slightly behind the cg instead of just forward.

Where is the cg in percentage of the wing chord?

Bill.