Vigas 60 wood placement

Hi guys, just installed a new Vigas 60 with 1000gal storage and i seem to have a problem with my wood placement, I've read all the posts here and tried multiple strategies but the only one that seems to work for me is to load it which ever way, front to back (my wood is 16-18" long) two rows and come back after an hour or so and stir it up because the wood is all burnt close to nozzles and hung up every where else. Any ideas, should I be making smaller splits or what, i have roughly 10-12" diameter wood split in half or three. I would like to load it up 3/4 full and let er gas. Any suggestions would be great... Burning maple and white birch at 18-23% moisture, tubes are spotless and stack temps are usually 380-500°f . Thanks guys,learning alot on this site along the way.

Thanks guys, i will try different methods mentioned here, so far smaller splits have been working better but seams to be more work than I wished for. Yes i checked moisture after splitting wood, my maple seams to be burning better than the birch, maybe I'll try mixing them up a bit and see what happens. Thanks again guys

Also are you guys cleaning all ash and coals out of firebox before every fire to get wood as close as possible nozzles? Right now because i am only heating my shop i fire every 3-4 days so i try to burn down everything because coals just go to waste for me.

Thanks guys, i cleaned out bottom chamber, raked the ashes to the side in firebox and split my wood into beer can size and got my storage from 90°f to 190°f in 5-1/2 hours and two loads into vigas. She gased the whole time, i had to resist opening firebox to see how it was burning but i did open lower chamber to see if it was gassing (multiple times I think my wood is the problem, it not being 18% with every pc. Some splits i checked today i had up to 30% moisture but mostly in the 20-26% and smaller pcs lower. I have a cord in garage now all split into beer can size.