@withered_preacher I think has mentioned this along with others using that estate agent sign material.
Edit: correx. Beaten to it.
Yep, coroplast as it’s called out here, also more recently found that cut up krazy karpets (plastic sled) work well too. Anything semi-rigid, even thin baltic birch for your eroica ride.
@withered_preacher started
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@withered_preacher I think has mentioned this along with others using that estate agent sign material.
Edit: correx. Beaten to it.