50 It 's all about the proper staging: bulk y, but at the same time delicate musical instruments are in good hands in a large bi-fold lif t system, both well protected and easily accessible. The elegant design with narrow aluminium frames as well as suitable lighting underscores the impor tance of this cher ished hobby. AVENTOS HF For the bi-fold lif t system: front folds up AVENTOS HK top For the stay lif t: one-par t front pivots up