"I today conitnued with the aileron counterbalance ribs and also the drilling of the lead blocks. it took a bit of getting used to the lead as it heats up with thedrillling. I have to drill extract it clear the waste and then drill again bitby bit. If I didn't the drill piece would bind and then snap. I broke 3 drill bits this way. So patiently I did the holes from each side and tidied them up > i looksely bolted them together and then inserted them into the aileron skins to drill the ribs with the counterbalance assemlby inplace
This process went quite well. I am glad it is over though. I did not get any pictures of this process. I will insert one when I have the ailerons being rivetted."