At first glance, the main problem of cloning the firmware of the device is Thumb code is typically 65% of the size of the ARM code and.
I downloaded the archive you referenced and the first thing I noticed was that the firmware files are very heavy in the 0x80 - 0xff range. Inverting.
Software & Firmware Downloads. thumb Software thumb Firmware. Listed here are the available free software and firmware updates for our instruments.