Valoys require the short neck bulbs which are near impossible to find, have no anti newton disk, and no good way to place VC filter inside. If you try to go over 8x10, the photo hits the column foot.
The long neck bulbs cause uneven light and there is no up/down bulb adjustment like a IC has to counter it.
My Valloy 2 is heavily modified to overcome all the stated defects. For Sale in USA.