Central location for controller mod options?

[Goemon]

Not sure if this is the right place but I was looking for some kind of comprehensive list of controller mods and how to implement them.

I myself am wanting to mod an old arcade stick to work on the PCE but have no clues on different methods, pros and cons etc.

Does a list of methods exist?
So far on my searches I've found the following...

Adapter for PlayStation controllers
http://www.tototek.com/store/index.php?main_page=product_info&cPath=23&products_id=51

MC Cthulhu
https://paradisearcadeshop.com/fgc-console-joystick/1828-toodles-mc-cthulhu.html

NES controller mod
http://www.mmmonkey.co.uk/nes-to-pc-engine-controller-mod/

I'm guessing you canalso just scrap PC Engine controller and put the innards in a stick...?

Do people have feedback on things they've done/used? Whats easy/hard? Limitations etc.

[fluxcore]

The UPCB (which was an open-source project Toodles made before the Cthulu) also has good support for PC Engine - after I re-wrote it with some help from RDC. Supports 2 button and 6 button, and multitap.

The biggest issue with it is that there's nowhere to buy it, can only build it yourself.

https://github.com/fluxcorenz/UPCB

[Keith Courage]

I've used the method mentioned in the NES controller modification to make all different kinds of joysticks work with a PC engine. shouldn't be too difficult to go that route or just take the innards out of a PC engine controller like you mentioned.

[haightc]

I was thinking about starting a controller review thread.  I have several different controllers, there are lots of different mod and adapters.    I would be interesting to compare lag, feel and function of the many options available.