I think that on my set-up, 99% of the radiator's weight is on the lower fittings (which are strong). The upper fitting points attached to the side plate just stop the radiator to move back and forth, but actually don't support any weight. It is not like the whole radiator was hanging just attached by the side plate's holes, if you see what I mean.
So I think it is OK, but I will have to confirm this when the car is running.
Thank you very much for the info anyway
