The height gain for all that work/cost is very little. Worth considering. Yer will also be modding the vehicle away from the manufacturers original build. Regardless of it being FL1 parts yer fitting... yer will still need to advise yer insurance.
Personally if I had a Sport and wanted more hight for off road use. I'd actually sell the Sport on and buy a normal FL1. The Sports get a premium price by comparison to a similarly spec'd non Sport model. Adding different suspension and wheels to a Sport will devalue it substantially, so doesn't make sense in my mind.