I recall those particular monkeys. My recomendation, particularly for those likely to remain in spinal precautions for a prolonged period, would be to use a spinal rated scoop instead of a board. The curve of the scoop, and the space between the halves in line with the spine, make it dramatically more comfortable. If you have a couple of those polar fleece blankets I know a great procedure to use them to pad up a scoop for those interfacility transports when a patient can't be cleared by x-ray. The average SMR practice in Alberta gives me nightmares when I think of the ridiculous number of unduly caused pressure sores that result from it.