I'm thinking with the extreme dry conditions this summer, that come fall offering top dressing/overseeding will be a fairly marketable service for me. This is also a new service for me (to do in large quantities). When we've done it in the last its basically been a job-by-job deal and we would just do with the old fashioned way of hand-sprinkling a topsoil/compost mix and then going over it with the drop spreader with seed and starter fert. If we do this on a larger scale, thats gonna be too time consuming, so I'm looking for other options. I guess what I want to know, is whats the difference between a topdresser and an overseeder, and also whats the difference between the types? I've used a slit-seeder (or lawn renovator some call it I think), but what about these ones that attach to the front of a power rake vs these things that look like a giant wheelbarrow with some sort of drop spreader mechanism on them? Could I, in theory, just use a heavy duty drop spreader? or would the topsoil/compost mix just be too much for that to handle?