Make sure you get the proper condenser sets for the formats you will be printing. There are three 4x5 , 2 1/4x 3 1/4 , and 35mm . You can use larger sets for smaller negs with some corner darkening, but can not go up. The darkening is minor and most do not see it, but it is there.
You will need proper lens cones also. These extend the short bellows to the length need for larger formats. 50mm lenses go on a flat board . 75/80 should be on a 1 1/2 cone, but you can get away with the flat board for larger prints. 135mm goes on a 3 inch cone. 150 goes on a 6 inch cone. Some compromises are possible, but you will not get the full range of print sizes.
Frankly I would shop for a D5 or D6 because you don`t need all the junk to make it work with all formats. The heads are diffusion for variable condenser and long bellows eliminate the need for the lens cones.
But if you want it for 35 mm and it is set up for 35, your are good to go. If you have to buy all the condensers and cones for other formats, you will wish you bought something else.
The biggest advantage of 4x5 Omegas is they are alignable in all three planes although the lens plane left/right is kind of funky. This was corrected on later models. Alignment is important otherwise you get keystone distortion and/or the entire neg will not focus all at the same time.
Good luck. I wish I could be there to help. Don`t be afraid to leave it and ask more questions here. They don`t sell fast.
