I find in the majority of bird reserve hides that the opening dimensions mean that using an angled scope while seated means the object lens of the scope is lower than the bottom of the opening. Standing and keeping the object lens lower than the top of the opening means an uncomfortable stoop, not easy for those of us of advanced years. There are two solutions, deeper openings that compromise hiding from the birds or adjustable height individual seats or seats that are designed to suit the openings. Adjustable seats seem to fail quite soon after being supplied. I’ve been pondering carrying a block of some type to carry about with me but designing one that is of sufficent light weight and robustness has defeated me thus far. I’ve spoken to one or two wardens of hide design and apparently the RSPB have debated it. Has anyone any views on this matter or am I making too much of it. I’ve found that all hides are binocular friendly.