Important addition to page 48 of the XRAY X4'26 manual!

When using servo mounting alternative 2 & 3 with an 1.5mm chassis, you need to use optional 110° screws to fit the longer #306280 mount.

110deg screws can be bought in smaller quantities, part numbers 913305 for M3x5, and 913308 for M3x8. The full set of screws has part number 301020.