Made a trip to a friends small engine salvage yard Monday and ran across and old Bolens Front tine tiller. Checked the inside tine shaft size and it was what I was after. Outside measurements was right at 14" which is what the Bolens round back tiller is. Long story short, got the tines off and with some home made adaptors I have them mounted on the Bolens round back tiller. 2 on the left side and one on the right. Will make a trip to the welding shop in the morning and pick up some light sheet metal for the top and drag flaps. Should make an inexpensive extension for the tiller to cover the rear wheel tracks. If anyone wants more detain PM me or I can add it as an addition to this topic.