Now some real nice features can be designed in. Then herman comes along with a great idea: he opts for single purpose toolsets, one for the Mk5, and one for the Mk10. The critical HP O-ring is buried inside the body coaxing it out is difficult at best and putting a new one back in is worthy of my best collection of curses: the bore, or channel where it lives is so short, it just keep falling out. Servicing the SP Mk10 has been my worst nightmare since day one. Herman’s new tools for servicing the Scubapro Mk5 & Mk10, take 2 Look for Custom Scuba Tools on eBay, at Shop Online or PM Herman on ScubaBoard.Īnother well made tool from Herman-thanks. The Custom Scuba Tools o-ring insertion tool is competitively priced and much easier to use than the tool currently available. Compare that with having to first mount the regulator body in a vice or on a tank valve and it is easy to see why this design is superior. My very first attempt at installing a new o-ring was successful and took 10 seconds flat. A 360 degree twist of the rod seats the seal in the groove. The same end of the rod has a slot which guides the o-ring into place. This prevents the rod from pushing the o-ring past the groove into the high pressure chamber. The insertion rod is machined in a fashion so that only the end of the dowel will fit into the o-ring groove. A close inspection of the CST insertion rod reveals a couple of improvement Herman incorporated into his ingenious design. The o-ring insertion rod of the currently available device is a single diameter and will pass through the regulator body and o-ring. Thanks to the design of the Custom Scuba Tools lower guide, it can be used on a flat surface such as a work bench or table. The older design when used without mounting it to a tank or held by some other method is very awkward. ![]() They also operate based on the same concept however there are some important differences. If you've ever attempted to install the piston stem o-ring, you know it can be a chore unless you have a specially designed tool to do so.Īt first glance the Custom Scuba Tools device looks very similar to the other tool available. Herman’s Custom Scuba Tools MK 10 and MK 5 piston stem o-ring tool makes installing the piston stem o-ring an easy task. ![]() I just received my new toys from Herman and I am impressed to say the least.
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