Nice work. It looks pretty bomber and it's a great example of the K.I.S.S. principle that I try to apply to all my gear.

I don't see any tabs or velcro to assist in keeping it positioned under your pad. Is this not a problem for you? Maybe you are a very sound sleeper?
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If you only travel on sunny days you will never reach your destination.*

* May not apply at certain latitudes in Canada and elsewhere.