Thanks for the replies guys.
As McGiever mentioned, the door isn't full width and the pit is good sized. Could fab a pan to catch some of it I'd guess. Not sure if it ever had one, may have originally but was missing since we've owned the house...
I do try to shovel gently, but seems no matter how I do it, it gets pretty dusty when emptying the shovel into the bucket. Started burning Harmony coal last year and it seemed even worse for the dust (but the reduction in ash made up for it). Anxious to try the "new" Harmony, reviews have been decent
May try the idea of running a vacuum next to the bucket
As for being a "clinker deputy", can't say I've ever had any clinkers to speak of. Been burning since December 2010, maybe I just don't burn hot enough for them to form? The ash I get back is usually pretty well burned, nothing too large in there. That's why I thought maybe this would work...