Not really a fan of the spacebar + 3 key 40s kit. I'd consider moving the 3 key into base and adding the split bars in base into spacebar kit. The whole purpose of 3 key is to make it so you don't need to buy a separate kit to get some 40s ability. Additionally, the spacebars offered here aren't really common. You are splitting up your audience for this kit into 3 categories: one being someone who REALLY wants 3 key 40s, someone who REALLY wants 6u, or someone who REALLY wants 2x 3u with 1u. 2x 3u and 6u aren't often used with 40s boards. DM me if you need help with kiting here.