I built the JGRO in its imperial units and had no problem although we are officially metric. Get an imperial tape and rule or convert the units to metric, its not that hard.
Funny enough its easier to convert some of the hole diameters to mm than to get them to 1/16 or 1/32 fractions.
As Hack posted 1 inch = 25.4mm
You do not need any other info.
In some cases metric is easier to use than imperial, however for physically building a project I opt for imperial. When drawing objects in CAD both for my CNC machine and otherwise I opt for metric.
Jason |