Update: forum admin has changed my username as there was a problem with what I originally wanted (username I chose caused registration failure) and had to choose an alternative (Tunturi). They kindly fixed the problem and changed my username to Toni. Thank you for that. Cannot edit the original thread subject so Tunturi remains there.

Another update: my Sub parts kit arrived. Have been examining it and this far I am quite happy. Have no experience with subs but I feel it will do just fine for me. I was wondering if anybody could say which factory made it but maybe I'll make a new thread on that matter.