Rosa festival Main Stage

We are errecting a mainstage at rosa festival 2022 in the derbyshire dales starting on the 15th july. The mainstage is constructed using a 23 ft cattle trailer which has been modified to house a dj booth and stage area. The modifications have been made using steel sections welded into place. Ontop we will be placing a production structure known as the stags head. We are looking for an engineer to inspect and sign off the stage for use at our festival on Thursday the 14th. If someone has prevoius experience with temporary demountable strucutures would be great but not a necessity.