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MadMax · November 11th, 2009, 01:46

Stay away from that knockoff of my V4 adaptor. They screwed up the spring design so it falls out and the tip is missing a feature which gives a good connection to the mag fill valve. It shoots a bunch of gas everywhere when you try to use it. You'll note that my original V4 design had a different diameter at the outer end of the spring. This diameter centred with the valve opening on a propane tank so the spring didn't bind with the probe. I went thru some considerable expense to get this feature done to prevent occasional spring bind which sometimes prevented proper opening of the tank valve.

I periodically buy knockoffs of my products to see what kind of crap I'm up against in the field.

So far, I've found that the Madbull adaptors aren't bad. I actually like their design. I wanted to go with a valved adaptor way back when, but didn't have the machining capacity to make it so I developed the simpler moving probe adaptor to save on machining costs. Madbull went out of their way to go with their own design principle. I do hear that they've had problems with the thread sizing on their adaptors from time to time.

The KJW yellow knockoffs eventually fall apart. The plastic ring which holds the probe in falls off and turns into a four piece adaptor.

November 11th, 2009, 01:46	#7
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	Stay away from that knockoff of my V4 adaptor. They screwed up the spring design so it falls out and the tip is missing a feature which gives a good connection to the mag fill valve. It shoots a bunch of gas everywhere when you try to use it. You'll note that my original V4 design had a different diameter at the outer end of the spring. This diameter centred with the valve opening on a propane tank so the spring didn't bind with the probe. I went thru some considerable expense to get this feature done to prevent occasional spring bind which sometimes prevented proper opening of the tank valve. I periodically buy knockoffs of my products to see what kind of crap I'm up against in the field. So far, I've found that the Madbull adaptors aren't bad. I actually like their design. I wanted to go with a valved adaptor way back when, but didn't have the machining capacity to make it so I developed the simpler moving probe adaptor to save on machining costs. Madbull went out of their way to go with their own design principle. I do hear that they've had problems with the thread sizing on their adaptors from time to time. The KJW yellow knockoffs eventually fall apart. The plastic ring which holds the probe in falls off and turns into a four piece adaptor. __________________ Want nearly free GBB gas?