Hi E23 enthusiast, I found a gas tank (leak free) for $150.00. Question is, is this something I would be able to install myself or would you recommend having a professional install it. Secondly, my power antenna was snapped by some idiot at the college, as it only went down half way. I found a used antenna but the seller says it does not work mechanically, it there any other antenna from another model that would fit my 85 735i? Thanks Shaun 1985 735i