Thanks for your reply.
It will be similar to 7i43 EPP. Mesa boards are out of stock for a while according to Mesa. So I am looking for a solution to the shortage using other available ICs.
Also, having more options to me is always a good thing.
Note that Pico Systems has plenty of stock of the Universal Stepper Controller and Universal PWM Controller boards, and also the PPMC board set for analog servo drives. These boards use FPGAs to accelerate encoder counting and step/PWM output.
Jon