I had gauges in my hatch on the a-pilliar , but I didn't really care for how they looked in that location so I removed them and sold them. I really like the look of the kit that puts them under the radio and wanna go that way. I had an electric oil PSI gauge , but this time I really want to go with a full sweep mechanical gauge. I have read on here before that it is best not to use the nylon tubing that comes with the gauge , but to buy some other kind of tubing instead. What kind of tubing is that and where do you buy it?? Also any other tricks to a leak free installation?