I have one of the 5MM CF conversions marketed by Steve Schroeder in San Diego, CA. He supplies the CF conversion as well as 20 caliber bullets, brass cases, dies, etc.
The Certech/Eagle View conversion involves a lazer cut across the face of the original bolt head with a modified firing pin, and makes your rifle pretty much a permanent CF rifle.
Schroeder supplies an entirely new CF bolt head which is easily installed by driving out a cross pin, removing the RF bolt head, and replacing it with his new CF bolt head. It utilizes the original firing pin. It takes less that five miutes to change out the bolt heads.
Maybe I'm an eternal optomist, but if someone ever markets 5MM RF ammo again, all I have to do is swap back to the RF bolt head and I'm back in business.
The cost of both conversions is very close. IMHO, the new bolt head from Schroeder is extremely well made.
Brass is a little spendy at first, but 50 or 100 rounds should last you a long time. A load consisting of @4.5 to 5 grains of WW 296 powder is easy on brass. I shoot 32 grain Hornady V-Max bullets in mine.
I don't have Steve Schroeder's address and phone number handy right now, but if you'll look on the Twent Caliber Page, I know Mike J has contact info. for him there under the 20 caliber bullet selection.
http://www.angelfire.com/sd/6mmackley/twentycaliber.html
You'll end up spending more for the conversion than you will for a good used Model 591/592 rifle, but it's a neat little conversion and is a real "hoot to shoot" and my cheapy Model 591 rifle is extremely accurate at 100 yards.
Personally I like the 5MM cartridge better than I do my 17 HMR.
HTH - BCB