I am going to be radical and agree with GH, and add the Athena. Even if you have to raise parts prices 10-15% to offset the obvious groove Carl was in, that would still be quite fair.

I would suggest a barbell approach. Focus on parts and the larger more complicated kits (Saturn 1B), and as you go along populate the simple kits. That's what I do and it works. I have been making kits about as long as Semroc, hiatus subtracted.

Make clear on the website what is in stock and what is not. Have a link for reservations. Solved.

Business Mangler Jerry