at the moment i am converting an old NZ made begg till drill
my plan is to remove the front row of tynes ,leaving the front coulters aligned in front of the rear coulters ,hopefully this will handle a bit of trash
the result will be about 15' spacing with 2 coulters and a slotter which i will follow with seed and a rubber tyred roller
im hoping to sow a bit of oats/vetch etc for winter grazing, using pasture cropping tecniques!
it probably wont be ideal but a state of the art machine is about 25000$
Modifying an existing drill to meet your needs sounds like a cost effective way to go. I have looked here is the USA for small no till options and the new equipment starts around $4K and up. I have not found any used units here in Western Montana. I have thought about buying a used drill and basically cutting it in half. I had good luck frost seeding clover last spring but with the grass seeds you really need to drill them or prepare beds and broadcast seed and cultipak. But that defeats the advantage of no-till drill. Please post your results.
Even small old machines cost you around here--guys buy them for hunting food plots.
There used to be lots of old drills converted to no-till around here. You are on the right track. You may have to adjust/replace downpressure springs and/or add weight to the machine to go deep, but you probably will be fine for shallow overseeding. Most of the machines around here had a couple chunks of angle iron welded on to hold rows of concrete blocks.
"You must be the change you want to see in the world." "First they ignore you, then they laugh at you, then they fight you, then you win." --Mahatma Gandhi
"Preach the Gospel always, and if necessary, use words." --Francis of Assisi.
"Family farms work when the whole family works the farm." -- Adam Klaus