A single-ended to differential converter uses a cross-coupled latch that maximizes the output zero-crossing symmetry and is self compensating over PVT variations. Once identified, appropriate resources can then be deployed to fix the problem and to realize the opportunities so identified. The formation of the buffer layer includes a multi-level temperature modulation process having a plurality temperature levels and a plurality of temperature modulations. The J-shaped member adjustably connects to a generally vertically-disposed surface of the frame mount at a plurality of vertical positions to facilitate use by persons of different heights. Also provided are mixture and reaction products made using the methods.