i have got raws in all the cal. and have had all models (sold the Tm's as they were not getting the use) they are basically an updated Theoben rapid ( mk4 trigger later variant) and share the same mags, hammers, valves, regs and trigger units (mk4 triggers post 2007 rapid) i like them a lot they are highly modifiable and pretty much anyone can take them apart and do a reseal or valve swap however there are issues with them and this applies to even the pre airforce guns that are supposedly better but these issues are easily fixed.
over in the u.k. one of the best if not the best tuner of RAW's is a chap goes by the name bucketboy and he frequents the www.rapid7ownersclub.co.uk website which is also worth signing up to as like mentioned above they are an updated theoben rapid design gun and the above forum has a good technical section and development section.
here is a pic of my RAW mini based on the chassis gun that they showed at the shot show back in 2020 but have not done anything with since.......... it has a bucketboy shroud, 200cc bottle, bucketboy action tune (valve, hammer support sleeve, ssg device etc etc) and a law folding stock along with magpul furniture
One thing I have noticed with the chassis rifles is that you need high scope mounts to get the head position right