This was a well thought out design. It took a minimal of low cost, low quantity parts and implimented it into a nice design at a very reasonable price. While these speakers will never "rock the house" with volume or low bass, they do sound quite good.
In terms of placement, it is important that neither speaker see a nearfield reflection up close. My findings are that you can place them closer to a back wall than many other floorstanders ( this will reinforce low bass ) BUT they can't have anything between them or on the outside of them. I too would recommend running them "flat faced" and NOT toe'd in. They are not real big on localization or "rock solid" imaging but rather present a wide and equally distributed soundstage. If find this type of presentation more realistic when sitting at some distance from the stage at live events. Those that tend to go "front row" may not like this approach.
In terms of using spikes, are you on carpeting ? If so, what type of flooring under the carpet ? Wood, tile, concrete, etc ??? Something else that you might want to play around with is mass loading this specific design. Try a sandbag on top of the cabinet. You might have to play with the volume / weight of sand in the bag in order to find the optimum amount. You will find that this will play with the openness, air, harmonic overtones, bass weight, etc.. of their presentation.
I hope that you got a good deal on them and continue to enjoy them. I wouldn't mind stumbling across a set to tinker around with myself. Sean
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