I also conducted range test results. Initially with 2x non amplified rf modules (pcb antenna) it was not great, would have made it the distance i needed, but not enough for the type of project i want this to be.

Then i tried with the base using the PA/LNA External antenna type and this improved range greatly in open air.

i next revision i will use these in both base and sensor, the only draw back with these modules is if running off battery you must switch the vcc on/off with arduino between uses as their idle current consumption will kill your battery in no time, they dont power down their amplifier chips.