as I said in an earlier topic on potatoes this how I plant my seed spuds obviously cultivate the ground to a fine tilth I made a tool to fit my rotavator that opens the ground what I call a drill about six inches deep plant the potatoes in the row unfortunately I haven't mad a tool to fill in the drill so that's done by hand our ground is a bit on the heavy side but not clay
as for lifting the potatoes with a scuffle on the tractor you do get the odd damage potato but nothing to be concerned because we use them first
i have to say i don't know much about compact tractors or what machinary is available for planting you will need a ridger and as for a potato digger ?
you mite get a vintage ferguson potato spinner and other implements to fit your compact tractor at a vintage tractor sale or on line ? don't know what compact tractor you own and i assume you have a three point linkage on you compact tractor
like you i try to make life essier by using machinery these days i bought and restored a a three row potato planter used it once and put in storage same for the tree row ridger bought a new viking rotavator with a ridger and iron wheels
hope you find what your looking for and good luck