Top left account is the one going for xp. I made the layout of this vid just my entire 1080p monitor so you can see the mouse movement and client layout I use for this method. I have the "always on top" setting enabled in the "runelite" plugin within runelite on the 4 accounts repairing. This allows the account for the plank selling account to be between both the iron accounts buying planks without any wasted space.

This is also closer to 2.5 repair alts than 3 because I am always at least 1 repair cycle late to the first crane on my iron account buying planks (top right client). I also usually will not use more than one inventory of planks on the main accounts per lap to reduce effort. However since I was trying to have good rates for this recording I did a little bit. I think this hour was slightly unlucky based on how frequently the mains ran out of planks before finishing a lap. I plan on releasing a comprehensive guide for cranes in the coming weeks but comment any questions you have!