I concur with camshaft - start with cone - i tried the finger method first but could not get it to work satisfactorarily so looked at other methods and arrived at an aerosol can about 9" tall and approx half full by indicated weight - worked well - as previously needs to be about 1-2mm greater than cone edge to ensure inner seals to cone - did

no details on bottle however pm your address etc and i'll send on the extra i have - g/h supplied two bottles only used about 3/4 of a bottle - its white however! tony s

i just used glue and glasses and/or the base of aerosol cans of appropriate size the inner was a little troublesome as weight diam needs to be just a little larger than the inner ring edge to ensure it seals down properly good luck tony s

unfortunately not taken pics never thought to do so sorry - do not know of any black glues i used stuff supplied by good hifi - after thoughts are always good! know what i mean! tony s

Subsequent to the input in this item I have ploughed on with the refurb using the GoodHifi rings - seems to have worked ok - one suggestion though if black based tacky glue could be obtained I would suggest using it - maybe I'm too particular but the white rather detracts! also, using alcohol to clean off surplus glue should be used sparingly the

2 pack polyurethane or epoxy i think - if using epoxy ensure it has uv inhibitors or the coating will deteriorate in time - poly u more robust tony s

Have had the above system from new (mid'80's) can anyone give an idea of value and of the place to sell - all items are in good condition bearing in mind their age! I am UK based! tony s

Have not decided about the German jobs may just buy apair to try as I have 9 Good Hifi rings here at present! Re the curved edge, the cone has a diam of 57mm the outer of the inner has a diam of 55mm and the inner ridge on the underside sits over the cone rim - this is somewhat tricky to explain but hope i have got there! So i would say the ridge would

Hi Austin - i take your point but the rings supplied to me are compared to the original penta units below Outer diam penta 77.5 goodhifi 77.0 outer(inner) diam penta 74.5 good hifi 67.5 inner(outer) diam penta 58.0 good hifi 55.5 inner(inner) diam penta 52.0 good hifi 46.0 the good hif rings have a flat aspect the penta has an angled one - I am worried

salut i have 2 penta mk1's with foam rot - ialso purchased new rings from good hifi however the supplied rings seem to be too big, the inner edge would appear to need to fit a good half way down the cone and the ridge appears to not be in correct location - can you give details of your rings external , interanal , internal exterior ring and external