600 series planter

Welcome to the site, Greenfan. I think a 600 would be a step up. Take in mind that the "600" refers to the tool bar only, not the row units. The 600 is an excellent bar, as it has capabilities for no-till coulters and fertilizer, and is very heavy duty. The choices for row units vary, my preference would be the model 78 air champ, which uses low air pressure for singulation, and double disc openers. The fluted no-till coulters do a good job, but the down fall is that they are mounted to the tool bar frame instead of the row unit like newer ones are, and therefore don't float quite as well as needed. The packer wheel on any of the model row units is kind of a shortcoming as well, and doesn't close the trench as well as newer fangled closing wheels do. I do have a 600 with 78 units on it, and I like it, but am thinking about selling it, as it is an 8 row 36 inch, and I would like to move up to a 12 row 30 inch, as I may try to go after a little custom work. Any more questions, get in touch with me on here or through the  private messenger on this site.  All in all, most AC planters do a heck of a job for the money, as usually they go pretty cheap. Darrel

I am not sure about the 15 inch spacing, maybe some one else could answer to that. As far as you haveing sandy soil, that should eliminate any issues with seed trench closing, because mine does a dandy job in sandy soil, and if all my ground was sandy, I wouldn't even be thinking about changing planters.