Pictured left to right- Sitari, Orientari and Sadari : three examples of fretted/fretless hybrids. SPECIAL NOTE for those interested : Each hybrid instrument built by Ari Lehtela is a one-of-a-kind. The instruments shown in the photo show 3 examples of a single neck Hybrid. The Ari Lehtela Hybrid may be single or double neck, based on one of his models or custom built to include design ideas from the customer. Options available can include items such as a range of scale length/tuning center options, type of neck ( solid vs hollow ), single neck or double neck, ” microtonal ” partials, fixed or movable frets in addition to various other options