Lew,

I'll let Mango or Jerry deal specifically with the Webasto, but if you know th nozzle is OK, you do have to verify you are getting spark and I know that was covered in Mango's paper on the Webasto. Don't forget the electrode gap.

As far as the ballast, I used to order them direct from the manufacturer on my other coach and I think it was Thinlight. (All the papers went with the old bus so it is my memory at work here and we know how that is.) But, if I can remember I will bring some complete units with me to SF if you are going and you can cannibalize them for parts. I found on my last purchase that the whole unit from Camping World was cheaper than buying just the ballast, and I got two bulbs along with the ballast I really wanted.