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   I know that this has been done but I want to do one for me. Its going to be a 2 foot long 4 in PVC  with foot pedal. The piston is going to be 2 PVC end caps glued up with 4 BUNA-A 342 o-rings I have 90% of what I think I need. Hope the o-rings get to me by Friday 

Some of the parts 18 bucks so far still need 1 more 3 inch end cap and a base to sit it on 



The 3 inch end caps has this little nub that need to be sanded off 


Any input would be great :wazzapp: