Do you think that the supposed (I know you are not pushing any argument for or against) benefits to the bees are more important to the brood part of the hive? In other words is natural cell size not more important for solely the brood chamber if you are using an excluder? Also do you agree/think that foundation can store chemicals and thus should be kept out of the supers too ideally?
Still trying to plan my methodology!
Thanks
I'm sure Tom will be along to comment but for what it's worth my opinion:
I decided to go foundationless for three reasons:
1. Cost ... not insignificant if you buy best organic foundation from a good supplier.
2. Concerns that, even with good quality foundation, there is the potential for chemicals in the wax (residual varroacides or contaminants - I have even heard that some foundation is part paraffin wax).
3. If the bees build their own comb, solely from materials they have foraged or that I have provided in the way of syrup, then I know that they have only materials in the hive that I am happy with. They will build cells within the comb that they want to build, without influence from me as to the size, shape or nature. As far as I am concerned, this follows for both brood and honey storage areas. The bees will do what they want to do - my only addition/influence is frames and wires which. if they did not wish to use, they could easily ignore - but they haven't, they appear to readily accept the frames as a convenient structure within which they build, otherwise, completely natural comb.
There is apocryphal evidence that bees in foundationless hives are more relaxed ... certainly my bees are very well behaved .. and healthier and if this proves to be the case then I am happy, but I'm far from suggesting that it is an absolute. As it costs nothing (apart from some possible loss of honey production) then I considered it a no-brainer for my hobby beekeeping. There appear to me, to be few disadvantages or downsides.
It's a personal thing ... I know a number of people who are now going foundationless and are convinced that there are benefits ... if you are swayed, for or against foundationless, by the posts in this thread, then follow your gut feeling. Your own path in beekeeping is the one to seek - after consideration of the available information and evidence where it exists.
Good luck with whatever you decide to do.