I'm going to try and recharge air conditioner on my 99 Forester. I've looked at youtube videos and it looks pretty simple, but I did read a note about overcharging. Apparently if you only measure low-side pressure you can overfill. Is it necessary to measure high side as well? Any suggestions on kits? Looks like I can get them fairly cheap on ebay. Any tips or cautions? I'm not an idiot but I lack the mechanical skills and knowledge that most of the guys on this site have.
Thanks