Just a quick update
I took the full circle off & fitted a bassmax, big improvement
I adapted a used bridge (ex dave Swift) with some Milliput to shape the feet (pics to follow)
It sounds great with no feedback issues, don't need a preamp
I re-bushed the end pin which has stopped the rattle
Done 3 gigs so far on it, love the sound, my pianist thinks it sounds better than many expensive instruments and I agree
And it's an easy carry
Result :-)