Tube match problems


Hi Everybody

I’m new here and would like to ask for your help. 

I got VTL power amp with 6l6 tubes. They were perfectly match. Unfortunatelly when I was recently moving, took out tubes and forgot to mark tubes against sockets. Now I’ve connected back whole my set up, most luckily tubes in wrong sockets, it doesn’t play as it was. I don’t have tools to check bias and it really difficult to find any place dealing with tube amps in my city. Any ideas to solve this issue, which makes me crazy :(((
mn
Post removed 
Yea, I’m already aware of that. I don’t have a practice, but red lots of articles how to match tube/amp and relevant safety precautions.

Thanks.
The only thing is, the amp doesn’t have bias points from outside and it looks like I have to access there removing bottom panel. 
Best tool ever......

http://www.vhtamp.com/products/vht-accessories/tube-tester-2

Worth every penny.  You can plug a DVM in to verify the analog meters accuracy.   Analog meters can be calibrated, mine were dead on from the factory though.  You don't have to use test points or speaker terminals.  Makes it much safer to bias.