I would tell you to just PM a certain person on here, but he may be getting tired of me sending questions his way, so here goes.

The best CB arrow for that CB are the Danny Miller Gold Tip Laser II's. They are made perfect for Excal's and are top notch for them. You can get the Excal arrows, but they have a front aluminum insert giving them a lower FOC balance. The Danny Miller arrows have a brass insert giving them a high FOC and are top notch. If you need to get your arrows from wal-mart you will need others to help you since I am not familiar with wal-mart arrows. But I have heard of some guys in here using eastons arrows and wal-mart has them. You will need one that has a flat nock and not a half moon nock, I know from what others have said that is important with Excal's release design. Smoke or awshucks will know, but I think you have to also keep your total arrow weight above 370 grains I think.

Stick with 100 grain, they come with it for a reason. I just bought a wal-mart 4*4 block target tonight for 28 bucks. I would say it is great for field tips but think it will wear out fast on B-Heads. a one year target for sure.
You will be happy if you do this! Did you get a stringing aid? If not, you will have to do better then I did with out it, or try not to get as mad as I did when I could not do it with out it! LOL!!

If you want a scope you will need Excal's scope mount. Then once you have that any plain jane wal-mart brand one inch rings will work. Congrats and good luck!