Looking good Sam I'm not running co2 at the minute I had same prob with a small fe I had it seemed to empty all in one go I suspect the reg and low pressure didn't have and problems with depositing stuff in the tank but got me rethinking my co2 set up was running both tanks of a single reg worked but was tricky balancing the tanks nothing for it but to invest in another reg and bottle see if you can get a pub co2 bottle I find these last much longer than a fe and my local retailer charges £50 quid initially then £25 per refill