I have several questions about post hole diggers. Anyone have the Frontier PHD300? Itís quite a bit more expensive than a set of Tractor Supply diggers. Whatís the difference? Worth the money? Is a PHD 300 a good size for my 2038R? I noticed the Frontier has a down pressure kit. Is it worth it? How does it work? Does Tractor Supply diggers have a down pressure kit? I know, a lot of questions. Thanks, guys.