We get sooo many people asking about retro-fitting aircon to a Golf VR6 without. Most decide not to bother because they're not sure what's involved. Totally fair play to you for giving it a go, and sharing the details with us. If you can post a fully illustrated guide to fitting aircon, including installing the compressor pump, evaporator, radiator, routing all the pipes through the bulkhead and doing the electrics, a year's free premium membership will be yours.