Yes, we highly recommend hiring a plumber or contractor to install your new bathtub. We even include specifications sheets on our product pages (with dimensions) to show your contractor to verify fit before your purchase.
My Drain cover does not stay down or does not stay up.
The drain cover needs to be unscrewed and adjusted (ONLY the drain cover) which is done by rotating by hand till it comes out. There is an adjustment screw at the bottom of the drain cover stem (FIGURE 13) on diagram. This screw needs to be adjusted by slightly lengthening or shortening so that the drain body grabs ahold of that screw properly. This adjustment screw is ALL that needs to be worked on.