Audio Desk vinyl cleaner disassembly

After my vinyl cleaner passed the 2-year mark, the water pump failed.  It was sent to Germany for repair and it costs a lot.  When it came back, one of the blower fans was not working, which means Audio Desk did not do a good job checking everything before shipping it back.

I will not send it back to Germany for repair and would like to try self repair.  But trying to disassemble the vinyl cleaner is a real challenge.  I remove the bottom rubber legs but cannot find any fasteners.  The front, back, and top covers are glued together, I think using PVC glue.

If anyone here have experience with the vinyl cleaner disassembly and/or self repair, please can share the methods which worked.  Thank you.
My control board has 4 screws, one in each corner of the panel-- but I assume we may have slightly different models. I hear that Reiner is not good at responding to problem calls. This is unfortunate for such a costly system. Fortunately, I have found UltraSystems, the US importer, to be very responsive.
Hi everyone, I hope those who have successfully opened the Audio Desk vinyl cleaner (for service or repair) are kind enough to share the method how to open it.  Thank you so much.
anwar, any luck over the last year with your AD cleaner?  or has anybody found a US repair person?
Thanks for any help
Hi gmc, maybe due to large number of AD cleaners sent back to Germany for repair, Reiner Glass decided to send repair instructions to the dealers Nov last year.  The local dealer shared the instruction with me.  For replacing the blower fans, the top cover needs to be removed by gentle knocking with mallet.  Once the top cover is removed, the fans are visible.  The fans were glued to the side walls and need to be pried off.

The new fan were installed to the side wall using hot glue gun.  The top cover requires Tangit PVC glue which the dealer gave me.  This whole unit was assembled using glue, no fasteners!

For water pump replacement, the external bottom cover needs to be knocked off and then the internal bottom cover needs to be drilled (large hole) for access to the water pump.  What a design...
Sounds like its but together cheaply this is why i have the Kl Audio its a much better unit.Good luck.