Oil Change due to comp burnout

[SkyWalker]

hi guys, doing a comp change next week on a VRV, inverter driven comp is down to earth, I haven't done an oil test but I am worried about oil in system and the other comp, if the oil has circulated around system. DOL comp is a scroll

I plan on either using acid away, anyone used this before? isit good? or pulling oil out of DOL comp (hermetic)

to pull the oil out I was thinking I might try and use an empty reclaim bottle (with Liquid and vapour connections) and use vac pump to pull it out (hose down suction pipe of comp, save completely sweating it out), if i do this is it consider ok to weigh the oil out rather than a ml measure? for replacement amount?

http://www.nucalgon.com/assets/prodlit/3-78.pdf this would do the job but seems a waste of £ if my method is safe?

how would you guys go about it?

thanks