I've used Ethol TEC in the two solution formula for about 10 years with 35mm Tech Pan 2415 with excellent results. Dilute 30:1, develop for 6 1/2 minutes at 70 F. An E.I. of 100 is bonus with this. Also it is dirt cheap, about $0.06 a roll and the stock solution lasts for 2-3 years with refrigeration. I print with 2 1/2 filter(about 0.6 gamma) on Ilford MF FB.(posted 9312 days ago)I also understand that Kodak recommends Xtol at 5:1 dilution. Not sure about the gamma or E.I. expected.