artie is a sponor of the site, and is great to do business with. you can PM him on this site, and he will get back to you within 24hrs. or look on the site for business hours and just call him. he will answer all of your questions. he does sell C&L and ProM.
in my opinion i like the ProM meters better, i have one on my cobra now. and i also have a C&L that came with my turbo kit, and plan on not even using it and just buying a matching ProM when i go crazy with injector size