Hi, I got tired of sticking a pencil in my coolant tank to figure out the level and broke down and made a simple sight gage. It came out pretty good so I made a dozen of them and listed them on eBay. I tried to post the installation pdf but not sure if cnczone will allow it. If your interested let me know and I'll email you the file (1.5Mb). The bulkhead thru fitting is small enough so it does not interfere with anything in the tank compartment (like the door).
http://cgi.ebay.com/ws/eBayISAPI.dll...m=130855648889
Thanks, Mark...