We recently started seeing fuel leaking out of our locking Newton fuel caps when the tanks were full or, sometimes, when doing acro. Our RV-8 is a 2004 and we acquired it last year. It was built with the optional locking caps that were offered at that time. This is what they look like. I called Van's and they could offer no help but they did mention that ACS had some parts that may work. I contacted ACS and found that they had a Newton A20L reseal kit so I ordered two. When they arrived, they didn't appear to be the correct parts so I sent them back. A short time later, I sent an email to Newton asking for any available help and Robin Voice, the owner, got right back in touch with me (amazing customer support). I had to send Robin a photo as he told me there were actually three variations of his design sold but they were all called the same thing! Robin also told me that the ACS parts should work but the new red end cap is now a one-time only part and that you can reuse the old pin style or use the new clip type. So, I reordered the ACS parts and they arrived yesterday. Part two will show and describe the disassembly, reseal and reassembly.