Upgrading the old G&G L85 with an ETU gearbox

Today we're looking at sprucing up my venerable G&G L85 by replacing her old mechanical switch gearbox with a new ETU gearbox and a Perun ETU++! Whilst I thought this would be a relatively straight forward affair, as it transpires it's not as simple as it first seemed! Also I'd like to apologise for the random glitches in the video, I attempted editing this one on my tablet and it apparently doesn't like multi-cam synced editing! I promise I'll go back to editing on my proper setup next time!