I have only used H&W Control developer with microfilms,by reducing the time even the contrasty Adox CMS 20 could be developed in it.
The EI obtained is good, but not up to that obtained using the dedicated developers from Spur.For conventional film one could try developing for a long time to see if it would build contrast.
The formula I gave above derives from that given for 2.1L of working solution here:
http://www.frugalphotographer.com/in...ry-general.htm
The phenidone is easy to dissolve in 70% isopropyl alcohol from a pharmacy.