Response from SukkoPera's Retro Works | June 24, 2019
Thanks for your review, Ronald. I'll add those chips to the compatibility list. I'm sorry the socket did not work your you, actually I find those are pretty good and grip to the CPU very tightly, provided that you don't plug/unplug them too many times. Did you file it a bit so that it doesn't get in the way of R102?
You can do this "Drive Switcher" yourself by using two (or three) stacked 40pin IC sockets and make the proper switching by wires on pin 13/14 and a 2-way, 6-pin switch. This is like "manual" switching.
This board offers a "chip" to do the switching, with either a jumper or a simple on/off switch (3 pin). It makes things interesting as you can, with proper circuitry, do the switching by reset (timer).
I like the board but the chip that came with the board was busted and it could be, probably, my fault! I used a better brand (DM74LS157N) to replace the existing one and everything went fine.