C5 - X7 spheres Recharge

[lcwin]

Hi STU, sorry i didin,t reply earlier as I hardly surf here. I am using only the multi membrane sphere to refill as the single membrane version cannot hold pressure for long. Last time when I refill them it will lose 10 % or more per year. The 3 dimple old sphere and the C5 spheres are all long life multi membrane sphere. Recharge to about 10 to 20 % higher than std will be perfect.