Have to totally agree there Richard and with the 10 psi rate! I have found it such a good way to do it that I invested in a better set up which is even better than the guns type variant I have now used for years. It too was via Temu, cheaper than uk gunson basic kit and obviously made for the western market for labelling and £100 cheaper. No filling and emptying as you store your fluid in the vessel itself.

For those reading this and deciding to take this route.... I can tell you Richard is not alone in his experience with leaks!, set it up and test it without brake fluid in the reservoir, any leaks will be just air leaks and you can safely rectify them before adding fluid!
Especially check the fluid reservoir cap.... be prepared to modify the seal of the air and fluid connections!