well it depends on which aircond shop you go to , i don't blame them if they say they cannot do , atleast they are giving a honest answer . unlike those who say they can do but in the end either screw up or charge too expensive .
as for this hinly , the bos itself does the work also , his a very busy , so better if you talk to him first before doing anything , well the reason i went to him cause he is able to present his aircond qualification cert from APM and Proton Air if not mistaken which really shows that he is not tepi jalan aircond service center .
http://www.vestax.fivio.net/4G63/compressor/2.jpg
and so far he does my car without any problem's even tho my aircond also was modified , but he was able to do it and didn't charge extra , like others did to me before .