Power/Monster Wheel balance wheal conversion for Thompson Mini Walking Foot clones Barracuda. Consew, Sailrite etc

I was unimpressed with the plastic Monster wheel from Sailrite. While it increased the torque it is light and feels kind flimsy compared to the original balance wheel, but the $130 for the aluminum version is not in the budget. I found a wheel designed by Testing321 on thingiverse, but it was aslso 100% plastic including the area that acts as a bushing, but it gave me the idea to create a adapter rather than a replacement. I used Testing321's design as a base as I liked the shape, but designed a two piece wheel that fits over the factory balance wheel and increases the size of the belt drive. I have yet to test the design I do not have a belt yet, but it fits tight and feels great. The photos are of a draft print. It bolts together with m4 x 20mm socket head allen screws threaded into the plastic (I don't think inserts are necessary). and I included voids for 8 10 x 20 mm stainless shelf pins if you what to add additional weight. I would consider adding extra walls to the gear portion of the design, and using a structure infill would be a good idea. The design prints wall with minimal tree supports. 

I would think nylon would be the ideal material, but PLA should work  as i wouldn't don't expect this part would get hot. Everything is designed to fit together tight! Assembly may require a little elbow grease