I ordered my original kit from Planetools as well. Compared to other kits it seemed to be a bit higher quality, for example including the DRDT2 dimpling tool as opposed to those that you whack with a hammer. I discovered early on that at least one drill bit size was needed for the RV14 that was not included in the kit. I called Isham to let him know, and perhaps now your tool kit might have it. I think your kit probably only includes the pneumatic squeezer (which is awesome) but you will likely need a hand squeezer too. I got mine from Cleaveland.
The deburring tools included in your toolkit are woefully inadequate. Not long ago I posted a plea to others on this forum asking for advice since it was taking so long to debur (especially those little flanges on the bulkheads!). I got some excellent advice that ended up with more tools in the mail, but I went from taking about 2 hours to debur half a bulkhead to about 10 minutes.
Also, despite being crazy expensive, the tungsten bucking bars seem to be the way to go. With all that mass in such a small package you can get them into tight spots, yet it requires fewer hits from the rivet gun to set the rivets than if you were using the plain steel bucking bars.
You will have to match drill some holes with high precision, and if you are like me, I suck at drilling straight holes. I recommend getting a set of drill slip bushings for that task; Brown tool has a good selection.
If you plan to prime, make sure you get a quality respirator so you aren't brain damaged by the end of your build. I got a 3M painter's model with organic vapor filters off of Amazon.
Buy a box of grey and maroon scotchbrite. You'll use those throughout the build. Buy a set of Oops rivets.
Build a back riveting table with a BIG steel plate so you have more flexibility in how you maneuver the part on the table. You do NOT want to back-rivet accidentally off the edge of the plate. Don't ask how I know.
Get an inspection mirror so you can examine hard-to-reach rivets after setting them.
Make sure you have easy access to both power and compressed air so you aren't dragging your part all over the shop. Make it so that the air and power are where you need them, and use one of those light-weight hose setups you can get from Cleaveland. It really works well.
Lastly, I've found that Cleaveland is extremely responsive and will have your order to your door in as little time as possible, which is nice if you are trying to keep the momentum going. There are many more tips that will probably come to me after I hit the submit button, but the bottom line is that necessity is the mother of tool buying. You'll be figuring it out as you go, or posting questions here as I have getting advice from those that have gone before us. Soon you will be paying it forward as I am here.