This is a picture of the straight line chuck being used with the
dome/pen chuck mounted. 

Straightline -The straight line chuck allows for a wide variety of setup options including the dome/pencil chuck, the index head mounted flat, and soon an oblique attachment for the index head that will not only work with the straight line chuck but also the double eccentric chuck.  On top of the long list of designs typically associated with the straightline chuck,  it can also produce designs much like those associated with a reciprocator. 

This is the complete set up for the straight line chuck.  It includes the saddle and the bed, but one may also want to add the index head which is not included. 

Modular Chuck System -The modular chuck system was designed to give a tremendous amount of versatility without costing a fortune.  Incorporating modified components from Sherline Products we've adapted parts from their inventory and mated them to ones built in house to produce traditional ornamental turning apparati.  The cost is much reduced in doing this because components move from one chuck to another allowing one to expand without buying every single part for every tool. 

The modular chuck system allows one to convert from a dome/pen chuck to a double eccentric chuck to a straight line chuck in minutes (soon we'll also have an oval chuck available).  On top of this one can stack the options.  For instance, as Hotzappfel suggested one can with the purchase of the dome chuck and an extra slide mount the dome chuck on top of the double eccentric to open the door to a plethora of possibilities.  In a few minutes one can then mount the dome chuck on top of the straight line chuck. 

Modular Chuck Bed - The modular chuck bed is one component in our modular chuck system. It's the bed (only) for the straightline chuck, dome chuck, double eccentric chuck, and in the future the oval chuck. This component is useful so you don't have to change the bed out every time you want to mount the straight line chuck.

Saddle and Slide - The Saddle and Slide is one component in our modular chuck system. This is the saddle and slide with the index head mount for the double eccentric slide and the straight line chuck. 

Straightline - This is the straight line chuck kit for the modular chuck system. If one already owns the dome chuck/double eccentric chuck this is all that is needed to be able to set up the straight line chuck.

Dome Chuck Package - This package includes 3 valuable accessories for the Rose Engine; dome chuck, phasing chuck and double eccentric chuck.

The dome chuck allows domes and hemispheres to be shaped on the rose engine. A tailstock is included if you want to use the dome chuck as a pencil chuck.

The phasing chuck allows you to make controlled indexing with a 5 degree loaded detent. A separate rack is included if you prefer not to use the detent.

The double eccentric chuck enables you to use 2 separate axis at one time.

Optional faceplate is included. The outgoing spindle size on these parts is 3/4" x 16 tpi. If you choose to use your standard 1" x 8 tpi accessories, you may need our spindle adapter.

The picture above shows the double eccentric chuck mounted on the Rose Engine.

Dome Chuck Riser - The riser block block allows one to add 2 1/2" of diameter to piece they want to turn with the dome chuck.  If the tailstock is necessary one can also be used to raise it to the same level. 

Extra Slide - By adding an extra dovetail slide to the mix one can place the dome chuck on top of the double eccentric chuck allowing for both concave and convex patterns to be cut not only on the tops of objects but also on the sides.  This second slide opens the doors to many extra applications that are not possible with the dome chuck alone. 

Leveling Chuck - The leveling or truing chuck is the traditional way of compensating for uneven materials or inaccuracies in work holding systems when moving from machine to machine.  The chuck not only compensates for inaccuracies radially like a four jaw chuck, but it also allows for adjustments axially which are virtually impossible to deal with otherwise. 

This tool is an absolute must for anyone turning layers or large diameter pieces where runout becomes pronounced because of the size.  Both the male and female threads are 1"-8.