Your winemaking is about to take a serious step forward. A well made table elderberry would be very similar to a good Chanti. There is a lot of old wives tales about edlerberries out there but its very easy to make wine from them. Are you picking your own? We have found the backing rack grate one of the easiest and fastest ways to pick. The berries are usually low in acid and you should determine the TA level at the start. Being low in acid they mix very well with higher acid fruits like blackberries, blueberries, raspberries and an apple elderberry blend is very popular at one of our local wineries.
One of the issues with elderberries is this waxy stuff that builds up on plastic, just to get it right order, to clean you simple rub it down with vegetable oil to dissolve the wax, then wash away the oil with hot soapy water.
Removing as many stems as possible is good, or pick in a way that minimizes introducing stems like with the baking rack.
Also since they are high in tannins, which is a very good thing, the longer you leave them in the must the more tannins you get, 3 or 4 days is good, 10 days you are going to have a wine that needs to be aged. I like to use a lot of berries, sometimes we macerate the fruit overnight with enzymes and then press them for the juice so we get a very fruity wine without all the tannins. And using the dried ones makes another unique outstanding wine that I think might even be better than the fresh fruit.
Oaked is outstanding. We also add elderberries to anything red to enhance the color and add a little tannins. THe aging thing is personal, we have most of our enjoyable at 6 months and get better and better with age.
We have a lot of elderberry stuff on our webpage that might help you our some, enjoy. WVMJ