Know any DIY spkr kits w/woofer driven full-range?

Just came across some Moth Audio Cicada drivers at speakercity.com for 119.95 each. They also have the cabinet drawings

You asked about any disadvantages. A woofer (or any driver for that matter) has very uneven frequency response, and poor off-axis response, as it approaches its high end frequency limit. It is best to silence the driver before it reaches this uneven range, and let a different driver, designed for higher frequency, take over.

Check out this link for kits or fully assembled.
http://www.decware.com/HDT/hdt.htm

Other kits are available using Lowther drivers. I was all set to bild a kit but found used Lowther foorstanding for about the same price as the drivers.

MC