Do you go into the sugarbush with the OC-4, i.e., pulling a gathering tank? I had heard that a little dozer was kinder on the maple roots. As for me most of the trees are roadside but we have one area on a steep side hill so that is all set out in tubing. We were clearing another small area this week where we can run tubing. It is/was full of hawthorn and balsam fir. No trees dripping here yet... too cold and I am glad. The sugarhouse got a thorough revamp this fall, new cement floor, new siding and paneling on the interior... stainless steel counter and new lighting as well.
   I would like to have a decent single axle trailer so I could put the gathering tank on that and then be able to use one of the Olivers for gathering.  Last winter we had to plow back the snow banks to get at the trees.... this year ....no snow! (we had 3/4 inch last night)
   I think it is cool that you have family pix of the old equipment working. I have one picture of the little OC-3 being used in the forest but don't know where it is at the moment..... taken about 1975.
        Cal