Well jake
I cant comment on parts as they are just down the road.... and cant coment on back up for the same reason
press rings arnt a fan of large stones, but what cast ring is?? they are durable thats for sure, quite hard wearing, most of the wearing parts are stock steel so you can make your own easy, (mainly the slide guides on the rear of the drill) There seed boxs have a habbit of sending the seed to the right side of the box for some reason ( left allways emptys 1st) no matter what way you are constanly turning, ihave run 3 diffrent drills and they all do it, realy odd to me
all in all they are a good cheap drill if you are mechanicly/ engenering inclined like we are, it breaks we fix it...
the most expensive part is the gear box, we havent broken ours but wanted a 2nd one for making a roller drill..
Our drill has a fert box and seed box, ill take some pics next week when im at the yard
ours has a moore sytem sticker on it....
Hope that didnt bore you to much