Went out to assess the jacking points. Realised the hole was quite small to get access to clean out potential grunge. The thought occurred to me to use a gizmo I have for cleaning out blocked drains. It's a pressure washer attachment that has three jets to force it into a pipe and one at the front to blast grunge. Would I be unwise to pop this into the sill and let it loose. Possibly overkill or a good idea prior to the ACF50?
