Tool of the month

My wheel alignment tool consists of two, 2.5 metre lengths of 25 x 50mm aluminium box section. Pop the back wheel on a paddock stand, lie the straight edges on either side of the bike, supported at either end with a block of wood or similar, then tie them together through the rear wheel using a strap or bungee (not tyre crushingly tight) so they’re parallel to the bike and the floor. The gap between the edges and the front wheel should be identical on both sides of the wheel. If not, adjust the rear axle position until they are. Can’t get it right? Something may be bent.