Dear Gprent,
Thanks for your reply. I think I should go to next size cylinder only, when I fully start filling the previous one? Even if we have been pumping since long, the pressure should not exceed more than 5Hg. Correct? Gprent, somewhere in thread, I saw that you recommended some pump but from Amazon.com. As I live in Germany, so I cannot get pumps from Amazon.com. I can get the pump only from Amaon.de. Can you please do me one favor? If you have a look on Amazon. De and recommend me a nice pump? For cylinder, I have selected the following one. This one is also available in 1.75".
masterminduk7