because the vertical channels in the side bars were not vertical....
Difficult to understand how they did that, from a machining point of view. Not central, or not lining up with top bar rebate or the bottom bars is a common fault, but so easily overcome.
Difficult to understand how they did that, from a machining point of view. Not central, or not lining up with top bar rebate or the bottom bars is a common fault, but so easily overcome.