Had my RV 10 transponder and static system done for IFR cert. Have a 430w with Advanced glass with backup ADI, airspeed and MGL Alt-1 altimeter on backup battery. Tech would not certify the Alt-1 because he could not check it at (1000) ft per the FAA requirement. MGL specs are (700) ft which one would wonder why they didn't go to (1000). Checked regs and tech is correct. While backup altimeter is not required, would be nice to have. This is 2 1/4 so conventional three hand altimeters are very expensive. Anybody ever run into this issue?