I had a major catastrophe with the original brackets when I tried to solder them using Durafix. The problem was just how was I going to recover from this situation. I’ve spent too much time on this poppet valve engine just to throw it all away. So, new brackets, a cleaned up crankcase and another do and fixing this all together.
The brackets are longer than the crankcase, the intention is to machine these back to size once they have been fixed in place
The brackets just roughly held in place. The damage is clearly visible.
Sharpie’s are a great alternative to engineers blue 
a surface table and simple height gauge to align each bracket 
fixed to the rotary table to machine groove 
groove machined 
bracket fitted into recess/groove 
fixing the brackets with caphead bolts
The holes were quite easy to machine, but I did need to make a special extension to the centre drill to make the countersink holes on the inside of the crankcase.
3mm tap needs a small lightweight tapwrench.
bolted toether 
some filling needed in the crankcase 
tight lines between brackets and crankcase 
durafix has flowed 
mix of durafix and bolts 
durafix can be lumpy
Bolted, soldered and then machined.
The brackets are still rather chunky, but I’m pleased this is coming together again.
I have to say that these brackets look rather good even with the engine just roughly held together.
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