I agree with all the other posts, and backup Kiddman response. I recently purchased the Canterbury GR and am going through the same process as you. My issue (?) in the end was with a "hot" tweeter, not a soft one. I did not and will not be lifting them so the tweeter is at ear level at this time.......not if it makes it hotter!
I have the units toed in just a hair to help cool the top end as well...in other words not pointed at my ears or just off the ears....too much! Again, I have them pointing straight ahead with slight toe-in.
With speaker wire, definately attach to the HF and jumper to the bass. I tried both at first, liked the HF best then, and recently, tried the other way around again and it was not even close, stay with speaker wire on HF, jumper to bass. Another note on speaker cable. I have heard that the Sablon biwire is phenominal on the Tannoy, and a great price as well. I am using Stealth V10 right now and believe that to be a reason for my hot tweeter. As soon as I can move the the Sablon I will be doing so.
I also found that adjusting the ports cleaned up and tuned the bass nicely. With respect to the adjustable high end, I have not had much luck playing with the two adjustments on the front of the speaker! I have played with them lots and the change seems to be minor! They do not cool my top end! The only thing that cools my top end is leaving the front panels on. This is the only speaker I have experienced "better" sound with the covers on. However,I strongly disagree with leaving them on while playing. I am sure the engineers did not design them with cloth in front of them for listening tests. If you have copper speaker wire I would love to hear how your system is working with the GR. I think when I get these fine tuned it's going to be awesome, as I have already had some peaks into what they can do on some of my material.