Edward rv5 vs varian hs652?

I’ve been using edward rv5 for short path distill for awhile . It’s been doing the job but not enough pressure pull when i connect it to cold trap . Some one just offer me the varian hs652 for 1K canadian ( without software and it’s rebuild - i have to buy software online ) , is there any one using varian similiar model ? With the software , can i use computer to control the vacuum or i still need the controller ? Is it worth it to replace what i have now - edward rv5 ? I need some idea , guys ! Thanks a lot !

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