RE: Propeller conversion chart
You can also increase ground clearance more than the 1/2" (that 2 to 3 blade switch will do) by extending the landing gear.
Those additional 123 grams (4.3 ounces) on the nose are no much weight and may be achieved by increasing the battery pack and/or relocating it.
During training, you will break several propellers; I would stick to 2-blade.
Regards