The swing axle subframe has to be cut open to make room for the IRS brackets, here is the first step:
A rough cut to allow a fine, step by step grinding and fidling to make the brackets a tight fit.
... much later: the bracket fits onto the frame. The jigs - which my buddy Ralf fabricated - help locating them in the perfect spot!
This is it: both brackets are located and fixed with the jigs. The next step will be the welding!
A special "Thank you" to Ralf for allowing me to work in your clean, warm workshop!










