get some pics up
You can add pics here and copy BB code link then paste in you post on here
https://www.techpowerup.org/upload" onclick="window.open(this.href);return false;
^^^ this, it's really quite easy.
I'm not registered with whatsapp and adding pics here makes it easy for everybody to see and add comment, group effort is better than just one persons advice.
I'm in Soton, if you like you can pop over to look at mine or bring your van for me to look at, I'm no expert but I have done this job.
SGS advertise them for a Holdsworth, if you buy online and they don't fit you have rights under law and they have to refund you or exchange.