You are welcome, after seeing how much afford and passion you put into your fpga design/work i thought to share this idea with you which gives you at least a chance to be competive and work toward a goal instead of chasing the asics.
Below a link to a equihash 150,5 miner. Beam, a new privacy crypto is currently using it and maybe this helps you with testing:
Good luck, would be nice if you keep this topic updated. Not that i understand all technical aspects, but at least me is curious how it works out at the end