George at Northcreek is of the impression that upgrading the internal wires won't make that much difference. OTH, if you google the subject, specifically regarding the 801's, some believe it to be beneficial. There is not much wiring internally. Wires to the main drivers are attached via a slip on connector. There are some who believe that soldering directly will improve the sound. Also, the wires to the revolving head unit involve another connector, allowing removal of the head unit. Again, some people believe eliminating the connector will improve the sound. Obviously, if you do this, the head is not so easily removed.
The bottom plate covers the original BW crossover, assuming the original purchaser of the Northcreeks left it there.
You did not mention if you also obtained the bass alignment filter. Some people feel the original BW filter muddies the sound a bit. Personally, I think it is essential to the overall package. If you can get the Krell filter, you'd be better off.
I would upgrade your amp, used Krell, Pass Labs would be worth an audition.
The bottom plate covers the original BW crossover, assuming the original purchaser of the Northcreeks left it there.
You did not mention if you also obtained the bass alignment filter. Some people feel the original BW filter muddies the sound a bit. Personally, I think it is essential to the overall package. If you can get the Krell filter, you'd be better off.
I would upgrade your amp, used Krell, Pass Labs would be worth an audition.