It nearly killed me, but now the filter is finished !!!
I also cleaned the optics, there was a thick layer of dust on the mirror and after the cleaning, the coating looks good !
It's collimated and I ran the new filter on the Sun today at various magnifications, this filter gives a deep orange colour, and using the off axis adapter at times (not always) gave a better albeit dimmer view.
I'll put up pics of the filter and additions when I get a chance.