Blockly wish list - Numerical-contants smbols and steppers motors

Two more wishes for Blockly

1. Could be possible to add numerical-constant symbol blocks (maybe a table, ...)?
Many times we calibrate a sensor and we got min a max values that are used some times in the program.
It should be nice to write once those values, like in BASIC (Symbol min_xx = 120)
I know I can use vars, but sometimes there are not enough of them.

2. What about blocks for stepper motors?
It's not easy to control them from Blockly.

There is no way to create constants in the Blockly core, so you will need to use variables for this.

There is no simple way to develop a stepper block as there are so many variants possible. However you can create stepper code in the same way as BASIC fairly simply e.g. starting like this:

Which is the fastest way to build a "lookup" command with blocks to deal with steeper motors?