I am sorry to hear that.
There is a reason that AlfaOwner has so many active members, this is because it's a friendly and informative place.
Your experience is the exception to the rule.
We have a good team of moderators here and when members have issues with anything they should click on the report button on the post, the moderation team will then look at the post and take the necessary measures to rectify the situation. As far as I am aware there haven't been any reports relating to your interaction on this site.
This is the first thread I have noticed of yours, I think your initial questions have been answered (with the majority of people suggesting to stick to the factory spec option) so hopefully that was at least of some help to you.
GTV TS - R.I.P
156 V6 - R.I.P
GTV V6 - R.I.P
147 Selespeed - Who knows
147 GTA - Gone but never forgotten
nice while it lasted