Corrections and editorial
If a specification, price or rating on this site does not match what the manufacturer publishes, tell us and include the page where the correct figure appears. Every number here is stored with its source and the date it was checked, so a correction is a small change to make and we would rather make it.
Manufacturers
If you build something in these categories and we have your specifications wrong, or we have left you out because we could not find published figures, get in touch. Publishing a spec sheet is usually all it takes to get listed — we do not list products we cannot source, and that is the only barrier.
Everything else
Reader questions, tips, and anything that does not fit above.
What we cannot do
We do not quote, sell or install anything. Where a product is dealer-only — which is most of this category — the pages here link to the manufacturer or an authorised dealer and you deal with them directly.