If I remember correctly, I'm not sure though, that the hot tuning coilovers are the same ones that are being sold on
www.ebay.de with many different brands like V-maxx, TA-Technix, H-Trac, Streetline, Maxxton, Hiltrac, Road-x, Street-tech etc.
If you have a picture of the set or a link to a website that sales them I could take a look if it is the same set.
A group of finnish 306 owners bought the TA-Technix ones via eBay and everyone has been very pleased with them. They say that they are very good compared to the low price. And they also come with a two year guarantee.
Also found this on Australian Golf GTI Forum:-
"....Well after running these for a month, I quite like them! I must say, the ride is rather hard and can feel a bit uncomfortable, but not as hard as my brother's gti which had FK coilies on. My suspension makes funny clunk noises now too which I've been told by a few people is just the springs and is normal on cheap coilover sets...."
.G.