Delrin caps won't be available for quite sometime until we exhaust the current stocks of anodised aluminium endcaps, of which we have several hundred, possibly 1000+ (haven't counted, but there are several dusty boxes lurking!)... anticipate 6 to 10 months before production would be considered using Delrin, and we'd have to outsource the cap production (probably to DangerDen) to get them made...
Regards proof-of-design, a selection of the res's have been hurled at brick walls, attacked with large spanners and much more (hammers etc) to try and break the endcaps off the acrylic tube. No attempts were succesful. The only time we managed to break one was by hitting the acrylic tube itself directly onto the corner of the brickwork. After all attempts, all reservoirs still remained leak-proof. We had 2 from the very first batch we made which leaked under pressure so reviewed the adhesive and application, made a few changes and problem resolved... Filled with boiling water and airtight sealed, no issues. Immediately empty and fill with cold water, no issues. Rinse and repeat over and over... still no issues... testing & QC will be ongoing thruout the products' lifespan either way to assess any other required changes to design in the future...
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