Also to consider:
this strategic level game is abstracted and to take say 50% of your money and goto “vegas” for the tech rolls is a flaw in the game IMO. Its fun but it does this:
player one spends 10-15 on tech and by luck gets heavy bombers… player two knows that his game is bust unless he basically spends all his money on his next turn and hopes he rolls well. Lets say he does not. Then he has for sure lost the game due to a turns loss of tempo. Its like losing your capital. The level of investment for tech in the game is way out of balance to what $ in this game represents. Instead tech should follow some natural inclination based on that nations track record that was established long before the war started. Thus germany will be closer to making some heavy tanks or jets because before the war they were allready close to this tech. USA was closer to making a A bomb than say Japan.
The free roll idea is one way to keep this things from destroying a nations budget with those vegas rolls. “Spend it all sleep in a hall” as the saying goes.
and i might add the fact that the allies who have done on average more research and have larger economies also have 3 rolls to the axis 2 rolls, however the axis have substantial gains in specific tech areas. This is truely more realistic and easy to use.
check it out:
a player rolls one d6 if he gets a 6 result he gets to check off a tech box bringing him closer to completing the tech required to obtain the new invention.