I noticed that a 1/8 npt 27 (female) to M10 (male) metric adapter is
being sold for Spyder paintball guns and at under $4.00 each it looked
like a good deal.  Well ... it turns out that the metric end is M10 X
1.25 not M10 X 1 which is what our engine cases need.

I ended up ordering (not available anywhere in Houlton, ME) an Auto
Meter adapter which can be seen here:

http://www.4myride.com/index.cfm?cmd=products.detail&pId=4004346

Mike