Xonatron

Mack, Thanks so much for the break down. I am stuck trying to get these parts in US or Canada, most of the stuff here is non-metric. If there happens to be readers of this thread from outside the UK like me, please let me know where I can pick up similar parts. Halfords will not ship across seas. Here's the parts again: Halfords Blanking Grommet 25mm (Code HFX321) £1.79 http://www.halfords....tegoryId_255229 Halfords Aerial Grommets 19, 22 and 24mm (Code HFX215) £1.79 (Only the 22mm is necessary) http://www.halfords....tegoryId_255229 Granville Black Silicone Sealant 40g £4.99 http://www.halfords....catalogId=10151