was looking t osee if they had a premade set up like i listed. I bouild wide due to limited space and i know i can reach my tub sitting in a chair ( be a wheel chair later in life to clean and check. reason i leave he lids on is due to not pushing the tubs allway back some times. with the lids on I prevent excapes. as for lidless the only pltwood around my area id the pine and with my luck the humidity issues would cause either a sap drip . or sap related toxic reaction wit the bp.