Hi guys- new to the forum and kit foxes in general, I have already bought a vans rv7a but have discovered that my mission has changed. I am considering buying a kit fox in flying condition, my questions are this- obviously there are big changes between the different models, does it make sense to buy a older version (like a 2,4 or 5) and upgrade it? Has anyone out there done anything like this? Thoughts, input? Thanks in advance